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05-20-2011 10:21 PM  8 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
ATX power supply fluctuations
Diego 2 559 05-21-2011 10:23 AM
Diego
write2dgray

rrApprentice

Seattle, WA

I've found that some converted power supplies require a slightly larger load for stable operation, you may try adding a second bulb or a larger resistor load.More wagging, less barking
 

05-20-2011 10:18 PM  8 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
IR ­čôĚ ( page 1 2 )
AnneThe Man 38 1825 06-22-2011 03:43 AM
yannick
write2dgray

rrApprentice

Seattle, WA

IR is the single best indicator of pack performance (voltage under load). Period. It is real and can be used to calculate power in flight and energy dissipated internally as heat, where C ratings are usually bogus marketing hype at best.

Capacity is also critical, easily measured, and has a direct relation with IR for a given chemistry, electrolyte composition, cathode, and anode.

Finally, cycle life is important for many of us here, and it has little relation to either of the traits above. It is more dependent on point defects in manufacturing, component construction, and impurities. This can not be tested short of running a full cycle life test (time!) and using multiple samples. One pack may be lucky and not represent the typical, or it may be unlucky with a larger latent defect that manifests at cycle 20 to a small internal short and a puffed cell.

- David
More wagging, less barking
 

05-20-2011 10:09 PM  8 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
My 24v Pb charging station in truck. ­čôĚ
Gernejr 7 2536 11-29-2011 09:37 AM
Bikman
write2dgray

rrApprentice

Seattle, WA

Very nice! I may have to do something like this myself, but with a wheeled cart for those times I do have to move it.

Thanks for sharing and that is one clean cut .
More wagging, less barking
 

05-20-2011 10:04 PM  8 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Need a serious server power supply guru!
Richardmid1 3 564 05-21-2011 02:35 AM
nabi
write2dgray

rrApprentice

Seattle, WA

Also, when poking around in these supplies be careful as they can retain high voltage (300+V) in the caps for a surprisingly long time.

Some have small bleed resistors to take care of this, but other designs don't.

Good luck!

- David
More wagging, less barking
 

05-13-2010 07:01 PM  9 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Which charger for 12 s 5000mah??? ­čôĚ ( page 1 2 3 4 )
Jacoub 62 4273 05-15-2010 02:57 AM
Jacoub
write2dgray

rrApprentice

Seattle, WA

Interesting and healthy discussion here folks. Thanks for the info!

I agree with the majority of folks here, that sync charging offers zero practical benefit, and a parallel charge would produce identical or better results.

I say better only since the average per cell imbalance (insignifcan, but real due to tolerance of components and A/D converters) is theoretically lower than that of a single pack due to an "averaging" of the imbalance across the packs being charged. So if the cell imbalance on a single pack is .01V, it woudl be .002V if spread across five packs charged at once in parallel. Sorry for that tangent .

And keep up the healthy debate!

Cheers,
David
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04-30-2010 06:11 PM  9 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
What's physically different between Lipos with different C ratings?
hazchem88 14 679 04-30-2010 06:11 PM
write2dgray
write2dgray

rrApprentice

Seattle, WA

It comes down to a few things, the first and most critical of which is the slurry used to coat the anode. Manufacturers vary in exact composition, doping elements, and level of purity. By varying these and/or improving application techniques, gains can be made in C rating and cycle life, but it takes time to prove out the effects of subtle changes. It seems all the manufacturers are getting "smarter," largely by trail and error in many instances, and shared knowledge.

The second largest variable, which also has a significant affect on cycle life, is the type, composition, and construction method for the separator film.

Another point of variance that was mentioned is the tabs used, but this is more of the elimination of a potential bottleneck in getting the power out than an actual improvement in composition resulting in an increase in C rating (understanding that so-called C rating is largely based on voltage drop under load, which can differ based on type/thickness of tabs used).
More wagging, less barking
 

04-20-2010 06:25 PM  9 years ago
TopicTopic StarterReplyViewLast Post
Closed ••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Opinons need on these chargers.............
scott011422 12 1045 04-20-2010 06:25 PM
write2dgray
write2dgray

rrApprentice

Seattle, WA

Scott,

Take a look at the youtube video a few posts back for a demo on how to charge LiPos in parallel using your exact set-up.

Note: this works for LiPo, Life, and even Pb type for that matter, but NiMH cells/packs should not be charged in parallel due to a difference in the algorithm and cell
peak detection.

- David
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04-18-2010 07:29 PM  9 years ago
TopicTopic StarterReplyViewLast Post
Closed ••­čÜüHelicopter e-Electric Battery-Charger-pSupply
I need help picking a charger ( page 1 2 3 )
JJsaratogaNY 41 2750 04-18-2010 08:33 PM
duke666
write2dgray

rrApprentice

Seattle, WA

In the never ending batteries->chargers->power supplies arms race, chargers will finally pull back ahead in the next month or so. Battery needs exceeded available chargers for a while as 5C+ charge packs of ever increasing size became available. Now we are scrambling to find power supplies and the other infrastructure to support the larger chargers. Fun times!

HeliMan Dave - I'll be in touch.

Cheers,
David
More wagging, less barking
 

04-17-2010 10:17 PM  9 years ago
TopicTopic StarterReplyViewLast Post
Closed ••­čÜüHelicopter e-Electric Battery-Charger-pSupply
I need help picking a charger ( page 1 2 3 )
JJsaratogaNY 41 2750 04-18-2010 08:33 PM
duke666
write2dgray

rrApprentice

Seattle, WA

Right on guys - thanks for the support.

HelimanDave/Justin: The multi-distributor will handle that sort of set-up, best bet will be to look at a higher input voltage to lower the current draw if possible; i.e. 24V power supplies. LEDs with multiple colors to indicate use, fuses on each, 25A to each switched outlet, 30A to the first unswitched.

Fenderstrat: Thanks for your help with the guidelines here, it certainly seems there are still some gray areas and I do my best to avoid controversy as best possible. And I certainly love to help whenever I can.

Let me know if there are any other questions that I can help with.

Cheers,
David
More wagging, less barking
 

04-17-2010 12:14 AM  9 years ago
TopicTopic StarterReplyViewLast Post
Closed ••­čÜüHelicopter e-Electric Battery-Charger-pSupply
I need help picking a charger ( page 1 2 3 )
JJsaratogaNY 41 2750 04-18-2010 08:33 PM
duke666
write2dgray

rrApprentice

Seattle, WA

I'll tip my hat a little here - there will be a few options:

* Lower power, plug-and-play (150-350W)
* High power, economical (500-1400W) - best bang for the buck, Chinese made, up to spec, but not "built to last a lifetime"
* High power, high quality - built to last, high quality, made in the USA, 12V and 24V options that can be combined in series and parallel for flexibility

Another option for multiple chargers on a single power supply is the use of a power strip to plug the chargers into. I have had some custom ones manufactured to specs to handle the higher current/voltage that these chargers need. I expect them in about three weeks, and they will have the ability to plug in (typical banana plugs) and switch 5-6 chargers from a single power supply.

They will appear similar to the one I have seen in the video here, but with improved build/specs:
http://www.youtube.com/watch?v=NczQwVTI2bY

I swear, I get more emails about that power strip than I do parallel charging based on this video.

Cheers,
David
More wagging, less barking
 

04-16-2010 11:34 PM  9 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
The Beast ­čôĚ
aristo1963 3 721 04-17-2010 10:07 AM
aristo1963
write2dgray

rrApprentice

Seattle, WA

VERY nice piece of work. I particularly like the digital displays - can you share the source and component you used for this?More wagging, less barking
 

04-16-2010 11:32 PM  9 years ago
TopicTopic StarterReplyViewLast Post
Closed ••­čÜüHelicopter e-Electric Battery-Charger-pSupply
I need help picking a charger ( page 1 2 3 )
JJsaratogaNY 41 2750 04-18-2010 08:33 PM
duke666
write2dgray

rrApprentice

Seattle, WA

Heya Justin,

I posted this in response on "the other forum" as well, but for the sake of those here, here's the answer and math:

Yes (slightly).

2x208B= 350Wx2=700W. Max. charge rate on each would be 13.9A (350W/25.2V), so you'd have a total of 27.8A of charging power for 6S packs between (2) 208Bs.

With a 3010B you can charge a 6S pack at up to the full 30A output, as this is less than 1000W (30Ax25.2V=756W).

So, it is a 27.8A max. combined (2x208B) vs. 30A max. (1x3010B).

- David
More wagging, less barking
 

04-16-2010 06:21 PM  9 years ago
TopicTopic StarterReplyViewLast Post
Closed ••­čÜüHelicopter e-Electric Battery-Charger-pSupply
I need help picking a charger ( page 1 2 3 )
JJsaratogaNY 41 2750 04-18-2010 08:33 PM
duke666
write2dgray

rrApprentice

Seattle, WA

Yes sir - we are the oldest and largest US distributor. Please PM or email if you'd like any more info, RunRyder frowns hard on posting any website links or what could be construed as a sales pitch here, for understandable reasons.

Cheers,
David Gray
ProgressiveRC
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04-16-2010 12:01 AM  9 years ago
TopicTopic StarterReplyViewLast Post
Closed ••­čÜüHelicopter e-Electric Battery-Charger-pSupply
I need help picking a charger ( page 1 2 3 )
JJsaratogaNY 41 2750 04-18-2010 08:33 PM
duke666
write2dgray

rrApprentice

Seattle, WA

Yes sir, we expect to have a few options to offer at that time, from budget to Cadillac.More wagging, less barking
 

04-15-2010 04:30 PM  9 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
looking to make a charger capable of charging 6s+ @ 5c :) ­čôĚ ( page 1 2 )
JEEPWORLD2002 33 2406 07-15-2010 11:37 PM
TJinGuy
write2dgray

rrApprentice

Seattle, WA

Final price has not been set, but expect it to be more than competitive. I will post the final price and ETA as soon as possible.More wagging, less barking
 

04-14-2010 11:33 PM  9 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
looking to make a charger capable of charging 6s+ @ 5c :) ­čôĚ ( page 1 2 )
JEEPWORLD2002 33 2406 07-15-2010 11:37 PM
TJinGuy
write2dgray

rrApprentice

Seattle, WA

The new 3010B charger coming in the next month from the iCharger folks should suit you perfect - 10S (native, single port), 30A max. charge rate, and 1000W.

- David
More wagging, less barking
 

04-14-2010 11:17 PM  9 years ago
TopicTopic StarterReplyViewLast Post
Closed ••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Opinons need on these chargers.............
scott011422 12 1045 04-20-2010 06:25 PM
write2dgray
write2dgray

rrApprentice

Seattle, WA

Yes, you got it and that is highly recommended. For example, I run 3S on my 450s and 6S (as 2 x 3S in series) on my 500s. Keep it simple .

Here's a little video I made a few months back demonstrating this using a 206B/P350 combo with the parallel charge cables I have available:

http://www.youtube.com/watch?v=NczQwVTI2bY

Hopefully this is helpful and let us know if you have any questions!

Cheers,
David
More wagging, less barking
 

04-14-2010 10:55 PM  9 years ago
TopicTopic StarterReplyViewLast Post
Closed ••­čÜüHelicopter e-Electric Battery-Charger-pSupply
I need help picking a charger ( page 1 2 3 )
JJsaratogaNY 41 2750 04-18-2010 08:33 PM
duke666
write2dgray

rrApprentice

Seattle, WA

There will be a new iCharger about the same time (or maybe a little sooner) than the upcoming beast from FMA. The new iCharger 3010B will be 1000W as well, with up to 30A and 10S balancing. Exciting times for e-flight !

- David
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04-14-2010 10:49 PM  9 years ago
TopicTopic StarterReplyViewLast Post
Closed ••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Opinons need on these chargers.............
scott011422 12 1045 04-20-2010 06:25 PM
write2dgray
write2dgray

rrApprentice

Seattle, WA

For your 8S packs I would look at running 2 x 4S in series, then charge them in parallel as 4S packs. This will allow you to get by with the 206B, which is up to 300W output and pairs well with a P350 power supply. If you do not already have a capable power supply, this combo is hard to beat in terms of price, power, and portability. The 206B is the newest iCharger, and has been on the market since Oct/Nov of last year (5+ months). The 106B+ has been out for about 2 years now.

- David
More wagging, less barking
 

04-14-2010 10:41 PM  9 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Kudos to Progressive RC
Dr.Ben 4 596 04-14-2010 10:41 PM
write2dgray
write2dgray

rrApprentice

Seattle, WA

Right on guys - thanks for the vote of confidence and support! I appreciate it and please let me know if I can help with anything at all.

Cheers,
David Gray
ProgressiveRC
More wagging, less barking
 

04-01-2010 07:20 PM  9 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
New Thunder Power Chargers
knightofcarnage 5 1579 04-01-2010 07:20 PM
write2dgray
write2dgray

rrApprentice

Seattle, WA

And here's a thread I recently started on the new ThunderPower TP-820CD. Not much info at the moment, but by the name I'd guess 8S and 20A charge rate.

http://www.rcgroups.com/forums/showthread.php?t=1215925

- David
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02-18-2010 05:42 PM  9 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Icharger 206B & Parallel Charge rates
Flyinrazrback 9 2631 02-18-2010 10:16 PM
TJinGuy
write2dgray

rrApprentice

Seattle, WA

Nice job Chris! Your web pages there are VERY handy for answering all of the most common questions. Thanks again for your work in putting them up.

Cheers,
David
More wagging, less barking
 

02-18-2010 05:39 PM  9 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Icharger 106B+ with PS-P350 PS for new 450 - Good Choice? ( page 1 2 )
Slac 26 3121 10-13-2010 11:47 PM
rexxigpilot
write2dgray

rrApprentice

Seattle, WA

Thanks for the recommendation Justin! And please let me know if you need any help Steve, an iCharger and P350 make a very powerful and compact combo. I just picked up a 600E myself two months back. I'm just finishing the build now and will be putting an iCharger 208B to work on the 8S packs I will be using in it.

Cheers,
David
ProgressiveRC
More wagging, less barking
 

12-10-2009 08:59 PM  9 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
What charger? 6S - 10S
LaurenceGough 18 1401 12-14-2009 08:32 PM
TJinGuy
write2dgray

rrApprentice

Seattle, WA

Right on. Thank Laurence and enjoy your 10S, they are great chargers.More wagging, less barking
 

12-10-2009 05:40 PM  9 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
looking to make a charger capable of charging 6s+ @ 5c :) ­čôĚ ( page 1 2 )
JEEPWORLD2002 33 2406 07-15-2010 11:37 PM
TJinGuy
write2dgray

rrApprentice

Seattle, WA

I am using a Cellpro 10s. You can charge up to 10 amps with this charger. I am charging 6s2650 Thunder power 45c batteries in 20 min at 6 amps only cause my power supply cannot hadle more than 25 amps.

You charge through the main plug, and balance plug with anything over 3 amps as the balance wire cannot handle anymore than about 3 amps.

If you not breaking it your not trying hard enough
Slight correction to above, the CellPro maxes out around 220W, so you would be limited to around 8.7A on a 6S pack (220W/25.2V).

Your best bet right now is an iCharger 208B. It has over 50% more power at 350W and can do a 3S at 20A or a 6S at a max. of 13.9A.

- David
More wagging, less barking
 

12-10-2009 05:07 PM  9 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Rapid Charge & Discharge Cycles of Lipo Packs ( page 1 2 )
HeliMan Dave 26 2392 12-11-2009 02:08 PM
dfrazier
write2dgray

rrApprentice

Seattle, WA

Yeah, the guy is insane. A cousin of mine down in Texas flies with him on occasion, team Youngblood dwells nearby. Some great pilots in htat group, but Jamie has some SERIOUS skills and potential. Also a normal guy who heads up the high school football team.

- David
More wagging, less barking
 

12-10-2009 04:59 PM  9 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
New charger preparation
josephk 1 416 12-10-2009 04:59 PM
write2dgray
write2dgray

rrApprentice

Seattle, WA

Joe,

2' is not a problem at all as long as the balancing cable is used. Cell voltages are monitored through the balance leads, so there is little voltage drop as only small (or zero) current is flowing through the balance leads when voltage is measured by the charger.

Welcome to lipos!

- David
More wagging, less barking
 

12-10-2009 04:57 PM  9 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
What charger? 6S - 10S
LaurenceGough 18 1401 12-14-2009 08:32 PM
TJinGuy
write2dgray

rrApprentice

Seattle, WA

Laurence,

Take a look at the iCharger line, they pack a lot of power for charging big batteries in a hurry:

- 106B+ : 6S / 10A / 250W $120
- 206B : 6S / 20A / 300W $150
- 208B : 8S / 20A / 350W $170
- 1010B+ : 10S / 10A / 300W $170

Post, email, or pm if you have any questions I can help with.

Cheers,
David
ProgressiveRC
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12-10-2009 04:51 PM  9 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
icharger 208b problem
Royand 4 1244 12-10-2009 04:51 PM
write2dgray
write2dgray

rrApprentice

Seattle, WA

A new firmware will be out in the next day or two to address the connection breakdown issue that a small percentage of iCharger users are seeing.

PM me if you would like for me to let you know as soon as it is released.

- David
More wagging, less barking
 

09-04-2009 12:56 AM  10 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Video: Parallel charging ­čôĚ ( page 1 2 3 )
TJinGuy 52 3810 11-02-2009 06:12 AM
G-13
write2dgray

rrApprentice

Seattle, WA

Right on. We are on the same page Wingman .

Cheers,
David
 

09-03-2009 11:06 PM  10 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Video: Parallel charging ­čôĚ ( page 1 2 3 )
TJinGuy 52 3810 11-02-2009 06:12 AM
G-13
write2dgray

rrApprentice

Seattle, WA

Awesome video Chris - thanks for sharing! If you don't mind, I will likely refer many users to this video when they have questions on parallel charging.

One note regarding the last post, balancing is just as important when charging in parallel as it is when charging single batteries and I would not advise charging lipos (especially at higher C rates) without monitoring balance through the balance connections.

Cheers,
David
 

08-13-2009 08:07 PM  10 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
iCharger 208B+ review of a sort ­čôĚ ( page 1 2 )
TJinGuy 34 7046 09-24-2009 06:33 PM
Reesy
write2dgray

rrApprentice

Seattle, WA

Gotcha sorted out Bryan. Please let me know if you need anything else.

Cheers,
David
ProgressiveRC.com
 

07-17-2009 08:47 PM  10 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Small Tear in Foil Wrap
Terrabit 7 844 07-19-2009 05:23 AM
Terrabit
write2dgray

rrApprentice

Seattle, WA

Yes, be safe. Carefully monitor cell or take it out of commission, i.e. replace the damaged cell.
 

07-17-2009 08:45 PM  10 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
What Charger should I get with a $200.00 budget? ( page 1 2 )
gbagley 21 1757 08-03-2009 10:47 AM
McKrackin
write2dgray

rrApprentice

Seattle, WA

Why? What would you rec. for >$200?

At 20A/350W and far less than $200, with all chemistry support and user updates, the iCharger 208B more than fits the bill and provides a great degree of "future-proofing."

What other specific needs might you have? What size cells are you charging and what are you planning to feed the charger with?

- David
 

06-23-2009 06:46 PM  10 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Need a Good Power Supply
Terrabit 19 763 06-26-2009 05:00 PM
Terrabit
write2dgray

rrApprentice

Seattle, WA

Hmmmm, that's odd about the email not working - it should as I use it every day. I get over 30 emails there a day. Let me know if you are still experiencing any problems and I'll look into it. The P350 supplies are nice - powerful, meet specs, safe, user friendly, and very compact. Let me know if you have any questions or need any help.

Cheers,
David
 

05-27-2009 02:09 AM  10 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Why is everyone dumping the Tp 1010c chargers?
RotoMoto 13 960 05-27-2009 02:09 AM
write2dgray
write2dgray

rrApprentice

Seattle, WA

Unless you need more than 160W output. The iCharger 1010B+ has almost double that for less $$.

Well, it certainly has the biggest font.
 

05-14-2009 10:21 PM  10 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Why is everyone dumping the Tp 1010c chargers?
RotoMoto 13 960 05-27-2009 02:09 AM
write2dgray
write2dgray

rrApprentice

Seattle, WA

I believe people are trading their TP 1010Cs in to pick up something with integrated balancing for added safety and simplicity.

- David
 

05-13-2009 06:21 PM  10 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Eneloop 2000 mah
Rob1962 1 540 05-13-2009 06:21 PM
write2dgray
write2dgray

rrApprentice

Seattle, WA

No need to cycle. They come about 60% charged. Discharge, forming charge, and then go to town.

- David
 

04-23-2009 10:59 PM  10 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Schulze Isl 6-330d
wargor 3 445 04-24-2009 01:40 AM
litespeed600
write2dgray

rrApprentice

Seattle, WA

They are still available for sell in a few places. Excellent chargers, I use one quite frequently. Built like a tank.
 

04-23-2009 03:46 AM  10 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
1010c pop, crackle and smoke....again.....
Riq 8 628 04-23-2009 03:17 PM
Riq
write2dgray

rrApprentice

Seattle, WA

No way I can find fault in a 12V Pb source, I'd write it off to a bad string of luck as well. Or possibly Karma. Have you done something to offend the charger gods?

- David
 

04-22-2009 11:23 PM  10 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
1010c pop, crackle and smoke....again.....
Riq 8 628 04-23-2009 03:17 PM
Riq
write2dgray

rrApprentice

Seattle, WA

I think you'll find TP less service friendly.

I'm leaning towards bad luck, the only other option if you are on grid power is the power supply. I know you said they are "expenive," but what exactly are you using?

- David
 

04-14-2009 10:22 PM  10 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Setting the Cellpro 10S up for 3x3s charging ­čôĚ ( page 1 2 )
TJinGuy 20 3208 04-17-2009 04:18 AM
TJinGuy
write2dgray

rrApprentice

Seattle, WA

A nice feature in the settings on the iCharger is the ability to adjust when balancing occurs, to quote from the iCharger manual:
For balance charging Li battery. There are three balance modes options: CV phase, storage voltage and always. If the balance mode is set to CV phase, when any cell's voltage reaches the set voltage for CV, it will enable the balancer. When set to ―always, the balancer will be enabled from the beginning of the charge process. When set to ―storage voltage, the balancer will be enabled when any cell's voltage exceeds the default storage voltage for the configured chemistry.
These chargers are set by default to only balance in CV phase, and that's how I leave it. Setting to -always would in essence place it in what FMA is calling "power balancing" mode, which is not generally recommended.

- David
 

04-14-2009 09:10 PM  10 years ago
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Setting the Cellpro 10S up for 3x3s charging ­čôĚ ( page 1 2 )
TJinGuy 20 3208 04-17-2009 04:18 AM
TJinGuy
write2dgray

rrApprentice

Seattle, WA

"During the entire charge process, the charger power balances the pack using 1A current until all cell voltages are within 1mV of each other."

Right there they are saying that the charger is charging the cells at 1A to balance them.
Power balancing as defined means discharging, not charging.
"Power balancing is the process of beginning the balancing process early in the charge cycle using high current to shunt excess cell voltage while other cells in the pack have a chance to catch up."

That makes me believe they are limiting the 1A to each cell to achieve the balance. That is what I take from it.
Power balancing means balancing from the moment the charge starts "using high current to shunt excess cell voltage" (up to 1A discharge), meaning bleeding cells with higher voltage at up to 1A rate of discharge to bring cells inline the moment the charge starts.

So, say you plug in a lipo that has three cells, cell 1 = 3.6V, cell 2=3.6V, and cell 3=3.8V. If you set the charge rate to 3A, all cells would start to charge at 3A, but a 1A shunt would be applied via the balancing circuit to cell 3 (effectively charging it at 2A), allowing the other cells to catch up. This is so called "power balancing." I argue this is counterproductive and that no balancing should occur prior to constant voltage stage (once cells have reached 4.20V) to reduce wasted power and time since cells are balanced and matched at the upper voltage range, not at lower voltage, and since they have a natural tendency to balance out at higher voltage, something that can be negatively affected by counterproductive balancing at lower
voltages.

It's good to understand how these guys work. I look forward to seeing your parallel adapter.

Cheers,
David
 

04-14-2009 08:51 PM  10 years ago
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Setting the Cellpro 10S up for 3x3s charging ­čôĚ ( page 1 2 )
TJinGuy 20 3208 04-17-2009 04:18 AM
TJinGuy
write2dgray

rrApprentice

Seattle, WA

One more nugget from the manual pertaining to serial vs. parallel charging:
When charging two packs, the packs are connected in series using four electronic switches inside the charger. In effect, the charger treats the two packs as a single pack. (For example, if you connect a 3s pack and a 4s pack, the charger operates on them as one 7s pack.) If the pack capacities are different for the two packs connected, the charge rate should be selected based on the lower capacity pack. Initially, the packs are charged at the selected charge rate (or the maximum charge rate possible) until one pack becomes fully chargedÔÇöhowever, the charger handles cell balancing of the two packs completely independently. The second pack continues to be charged at a minimum of 1A charge rate until it is full and balanced. Notice that one of the packs in a simultaneously charged pair is always topped off at a minimum rate of 1A (dictated by the maximum balance current available). If the packs have the same capacity, and were discharged to about the same level, both packs will charge in less than 30 minutes at 3C. However, if the packs have different capacities, or were discharged to different levels, charging for the pair could take longer than expected.
This issue doesn't exist with parallel charging. When charging multiple packs of different capacities in parallel all of them can be charged at any given C rate, rather than being limited by the smallest pack being charged.

Bottom line on parallel vs. serial charging:

1.) Parallel charging is safer and simpler than serial charging.
2.) If you fly identical packs in series and are already limited by your charger in charging current, but can charge additional cells in series - charge your packs in series.
3.) If you fly packs with the same cell count, of varying or identical capacities, and have additional current range available on your charger or would like to charge multiple packs simultaneously for convenience - charge in parallel.

- David
 

04-14-2009 08:42 PM  10 years ago
TopicTopic StarterReplyViewLast Post
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Setting the Cellpro 10S up for 3x3s charging ­čôĚ ( page 1 2 )
TJinGuy 20 3208 04-17-2009 04:18 AM
TJinGuy
write2dgray

rrApprentice

Seattle, WA

I have read many posts regarding how the Cellpro 10S works and I really thought it only charged. You really believe it balances differently with the main leads attached vs just the balance leads?
To quote from the manual, page 5, "When charging only through a node connector, the charger balances individual cells. However, charge current is limited to 4A to protect the small node connector wires. When charging through both node connector and discharge wires, the charger balances individual cells and measures individual cell internal resistances. Charge current is not limited to 4A."
Because when using the balance leads, it really does charge each cell individually right?
Not really, but kind of . In this operation it passes current from cell 1 positive to the last cell negative and shunts current from cells in between as required. Essentially using the outer balance wires in place of the main charge leads.
Or is it again just charging it across the whole pack and then discharging the cells individually?
Yep, this is how it works in all high powered balancing chargers made. They operate in serial charge fashion with cell monitoring and bleed circuits to keep cells in check.

To quote the manual, "During the entire charge process, the charger power balances the pack using 1A current until all cell voltages are within 1mV of each other. Power balancing is the process of beginning the balancing process early in the charge cycle using high current to shunt excess cell voltage while other cells in the pack have a chance to catch up. Power balancing means the pack tops off faster and the total charge time is greatly reduced. This is possible because the balance circuitry is internal to the charger."

I strongly disagree with the decision to implement "power balancing" as described above. Many packs are out of balance when highly discharged or half discharged and naturally come into balance during the constant current phase. I believe, and many others agree, that no balancing should take place prior to the constant phase.

It's little brother, the 4S, is different and has 4 separate charging circuits much like the DN Charger G2/G3 (these are the only two quality ones I know of). These chargers integrate multiple parallel charging circuits to charge each cell individually. Problem is, these are only good to 2A safely (4A in the opinion of FMA) via the balance leads. For higher current it is required to charge through the main charge/discharge leads.

- David
 

04-14-2009 07:24 PM  10 years ago
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Setting the Cellpro 10S up for 3x3s charging ­čôĚ ( page 1 2 )
TJinGuy 20 3208 04-17-2009 04:18 AM
TJinGuy
write2dgray

rrApprentice

Seattle, WA

Cool, no hard feelings here . And I agree, it's a pretty smart charger, but not unique in it's manner of operation.
The Cellpro can not discharge. It only charges.
There are 10 individual discharge circuits built in to the 10S that are rated at max. 1A each. These serve to discharge individual cells to provide balancing. There is no discharge mode per se, but they actively discharge to maintain cell balance during a charge.
You are correct that it charges through the main leads but it also charges through the balance leads at the same time (hence the charge each cell individually remark).
All charging at high rates takes place through the main leads, no positive current is ever carried through the balance leads (easily verifiable during operation with DC clamp meter).
So no it does not increase the charge time to have out of balance cells and no it does not waste charge current like a typical balancer, discharging the high cells.
It most certainly does bleed cells like any conventional balancer. There is only one device known to man that can do bleed-charge work as you describe, but it will cost you (~$300)! I present to you the ElProg Pulsar EQUALizer:

http://mysite.verizon.net/vze2qbfc/id27.html

I have personally directed many of these questions directly to Fred Marks. This and personal testing on a 10S has led me to these conclusions. It is a little hard to get a straight answer out of FMA on this though. One other "expert" on this is Charles (everydayflyer on RCG) and he has reached the same consensus. I encourage you to seek clarification, if desired, from FMA and see what you can figure out.

Cheers,
David
 

04-14-2009 06:01 PM  10 years ago
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Setting the Cellpro 10S up for 3x3s charging ­čôĚ ( page 1 2 )
TJinGuy 20 3208 04-17-2009 04:18 AM
TJinGuy
write2dgray

rrApprentice

Seattle, WA

Secondly there is no problem charging 2 or 3 3s packs in series on the Cellpro. It is more than capable of charging each cell individually no matter what the IR, capacity or state of discharge. It is not unsafe and will not hurt the batteries.
One last comment here on this - the issue is that the Cellpro DOES NOT charge each cell individually, but rather passes charging current through the entire pack via the main charge leads.

This leaves the balancing circuits (1A max.) to work at keeping the cells in check. This will not likely lead to an unsafe situation since smart chargers are able to throttle back overall charging current if a cell reaches to high of a voltage. It will, however, increase charge times, put more stress on cells (via cont. bleeding of some cells while others continue to charge), and make extra work for the charger.

Cheers,
David
 

04-14-2009 04:55 PM  10 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Setting the Cellpro 10S up for 3x3s charging ­čôĚ ( page 1 2 )
TJinGuy 20 3208 04-17-2009 04:18 AM
TJinGuy
write2dgray

rrApprentice

Seattle, WA

BUT unlike parallel charging, I am still balancing all the cells with the charger. If I were to put the packs in parallel, then I would either have to get a separate balancer for each pack or not balance them as I charged.
Slight addition/correction - both methods balance all cells using the charger, but parallel is MUCH safer due to issues such as differences in internal resistance between packs. This difference in IR can be due to differing capacity packs or even production run.

This problem doesn't exist when parallel charging and any capacity or brand pack with the same number of cells can be safely charged in parallel. All cells are balanced by the charger. Please take a look at the thread linked above for a multiple illustrations and a more detailed explanation of each method.

Some people always charge ALL cells in parallel for safety and simplicity, for example, a 10S pack can be charged as 10P (10 cells in parallel) using a simple harness. Then you are charging only to 4.20V (per cell) and all cells are perfectly balanced.

Serial charging should be avoided except for identical packs that are always used in series. Happy charging!

Cheers,
David
 

04-14-2009 01:30 AM  10 years ago
TopicTopic StarterReplyViewLast Post
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Setting the Cellpro 10S up for 3x3s charging ­čôĚ ( page 1 2 )
TJinGuy 20 3208 04-17-2009 04:18 AM
TJinGuy
write2dgray

rrApprentice

Seattle, WA

Nice work Chris! That said, I'd recommend parallel charging those packs vs. serial. Parallel packs can be charged together regardless of history, brand, or size while it is only recommended to charge packs in series that have been flow in series. Take a look at this thread for some great information on the ins and outs:

http://www.rcgroups.com/forums/showthread.php?t=932319

Cheers,
David
 

03-24-2009 05:23 PM  10 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Recommended LiPo Charger 10 -12 S with Balancer
KarbonBird 6 720 03-24-2009 05:23 PM
write2dgray
write2dgray

rrApprentice

Seattle, WA

All the options are full-featured multichemistry chargers, the differences lie in the power output capabilities.

The eStation 902 is a 12S charger good to 9.9A and 200W. 200W buys you about a 4 amp charge rate on a 12S lipo.

The Hyperion EOS0720iNET is only a 7S charger, but is good to 20A up to 250W.

As another option, I would recommend a pair of iCharger 106B+. Way cheaper than the other options and they are good to 6S, 10A, 250W. Charge a single 6S on each one at 10A which is possible with the 250W max.

- David
 

03-03-2009 01:36 AM  10 years ago
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Wattage output of Robbe Power Peak Infinity 3 charger?
Richardmid1 14 2322 03-03-2009 02:27 AM
TJinGuy
write2dgray

rrApprentice

Seattle, WA

Just to be clear, not picking boogers, but is that 9.5A on a 6S pack at 12V input, or what was being charged at 9.5A?

Cheers,
David
 

03-02-2009 05:30 PM  10 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Wattage output of Robbe Power Peak Infinity 3 charger?
Richardmid1 14 2322 03-03-2009 02:27 AM
TJinGuy
write2dgray

rrApprentice

Seattle, WA

FYI: iCharger does charge/discharge curves and internal resistance as well.

Chris: What input voltage are you using to get 10A charge rates on 6S packs using the FMA 10S?

- David
 

03-02-2009 05:16 PM  10 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Transmitter Lipo and diodes ( page 1 2 )
Herky 22 2941 03-08-2009 09:32 PM
jongam0
write2dgray

rrApprentice

Seattle, WA

No need for a diode, I've ran many lipos in a few radios with no problems and have known hundreds of others who have done the same. That said, one must exercise great caution to not leave the transmitter on and run the lipo down. As a matter of fact, due to this danger the use of NiXX cells is still advised.
 

01-18-2009 01:10 AM  10 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
tp610c and A123 charging
canbarelyhover 5 479 01-18-2009 01:10 AM
write2dgray
write2dgray

rrApprentice

Seattle, WA

That's a good power supply and should definitely not be the problem. Somethings likely wrong with your charger, the only other possibility I can think of is that the leads or connections on the pack are creating too much resistance, this could cause the charger to reduce current. I would look to see if you are using high gauge charge leads or excessively long, and if there are any bad joints or solder connections. If everything looks okay then you might try contacting the manufacturer/vendor to see if they have any input.

- David
 

01-18-2009 12:33 AM  10 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
tp610c and A123 charging
canbarelyhover 5 479 01-18-2009 01:10 AM
write2dgray
write2dgray

rrApprentice

Seattle, WA

Hmmm, you should be good on a 2S up to 10A with the 610C, max. charge voltage is 3.6Vx2 = 7.2V - with 80W max. charge it should able to get to the max. 10A charge. What kind of power supply are you using? What is the highest charge rate that it reaches?
 

01-17-2009 09:25 PM  10 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Charing multi packs ­čôĚ
M@x 5 501 01-17-2009 09:25 PM
write2dgray
write2dgray

rrApprentice

Seattle, WA

Parallel charging is in general far safer than series charging and can be done for any packs of the same cell count and relative discharge state. Take a look at this thread for some great info on the subject:

http://www.rcgroups.com/forums/showthread.php?t=932319
 

01-17-2009 09:23 PM  10 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
tp610c and A123 charging
canbarelyhover 5 479 01-18-2009 01:10 AM
write2dgray
write2dgray

rrApprentice

Seattle, WA

Is it a 2S or 3S A123 pack?
 

01-03-2009 07:24 PM  10 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Charging in parallel
smcbmw 6 441 01-06-2009 06:10 PM
smcbmw
write2dgray

rrApprentice

Seattle, WA

Agreed. Parallel is highly recommended over series, take a look at this thread for all the info you need:

http://www.rcgroups.com/forums/showthread.php?t=932319

- David
 

01-03-2009 07:23 PM  10 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
can it be done, worthwhile? two 6 cell packs into four 3 cell packs.
wileyeco 1 382 01-03-2009 07:23 PM
write2dgray
write2dgray

rrApprentice

Seattle, WA

Yes, it can be done. No it is not worthwhile. Rebuilding packs is more than a little bit tricky, and even with the right equipment great care must be taken. They are particularly sensitive to heat and special solder must often be used. It is also often difficult to separate some cells without delaminating the polybag wrapper due to the method of pack construction.
 

01-03-2009 07:20 PM  10 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
4.34 per cell is it normal?
alcastan 3 545 01-03-2009 08:24 PM
alcastan
write2dgray

rrApprentice

Seattle, WA

That is absolutely not good - anything over 12.65V or so on a 3S Lipo should be considered dangerous.

Please do not use the charger again until you can confirm that the fully charged voltage is not much over 12.60V. Use a DMM to confirm the voltage of the fully charged pack, if it is over 13V you might try adjusting the max. voltage of the charger, but if that is not an option I'd return that thing and get another one. What charger are you using?

- David
 

12-21-2008 01:58 AM  10 years ago
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••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Anybody seen this?
Shawn Pierce 8 817 01-08-2009 11:45 PM
jimboflies
write2dgray

rrApprentice

Seattle, WA

Nope, I've never seen that Chinese clone in use. I can say that the included balancer is the Apache SM-510. It is distributed separately, as can be seen here for sale on the chargers page for $60:

http://home.comcast.net/~truerc/Charge/chargers.htm
 

12-13-2008 12:27 AM  10 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
charging at 2C
joecass 16 697 12-13-2008 01:49 AM
TJinGuy
write2dgray

rrApprentice

Seattle, WA

Easy on the large caps, I've done my share of homework and I stand behind my statement. I am very well read on my chargers, sir.

The 10S is a "bleed" type balancing charger, unlike the 4S which was true parallel.

This can be confirmed yourself by looking at any charge graph from a multi-cell pack that begins (or approaches end of charge) out of balance.

When you say:
'C' rated charging is dependent upon cell voltage matching accuracy only. Charging @ increased amperage has up until recently relied on dissipating excess current via R-network's, many of which cannot 'dump' the excess energy fast enough via heatsinks.
Which recent chargers are you referring to? Their are some truly smart balancing solutions out there, like the ELPROG EQUALizer, but they are exceedingly rare.
The mentioned 10s charger can charge/match 10 individual cells, without 'DUMPING' any excess Voltage, via individual cell charging via the balance leads.
This is patently false - check into it yourself, here's a good place to start:

http://www.rcgroups.com/forums/show...ed#post10456426

- David
 

12-12-2008 07:43 PM  10 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
30C 5000mah vs. 20C 7500mah li-po
Richardmid1 5 569 12-14-2008 11:41 AM
Richardmid1
write2dgray

rrApprentice

Seattle, WA

Perceived power is all about voltage under load. The higher C rated packs and larger capacity packs, generally speaking, can hold a higher voltage under load.

For example, let's say you are pulling 30A from either pack. If one 6S lipo holds 3.4V/cell under load and one drops to 3.1V/cell under load, the first pack would provide 612W (3.4V*30A*6 cells) while the second only provides 558W (3.1V*30A*6 cells). This represents a 54W difference or ~10% more power.

- David
 

12-12-2008 07:26 PM  10 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
charging at 2C
joecass 16 697 12-13-2008 01:49 AM
TJinGuy
write2dgray

rrApprentice

Seattle, WA

3C is the future!

FlightPower's new EON 33-66C packs say you can charge them at 3C in conjuction with balancing. And even the EVO 25's can be charged at 2.5C.
3C is soooo yesterday , 5C charge rate lipos have been out for a while now courtesy of Neu. Charge your 2000 mAh packs up at 10A to allow A123 like charge rates of 12-15 minutes if your charger can handle it.

- David
 

12-12-2008 07:16 PM  10 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
charging at 2C
joecass 16 697 12-13-2008 01:49 AM
TJinGuy
write2dgray

rrApprentice

Seattle, WA

write2dgray does the cellpro 10s charger work like that?
No, it does not. The 10S is not able to throttle back charge rate if the balancers can't keep up, and unlike the 4S, the 10S is not a parallel charger. It charges through the main charge leads and "bleeds" current from cells to balance.

- David
 

12-11-2008 10:34 PM  10 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
charging at 2C
joecass 16 697 12-13-2008 01:49 AM
TJinGuy
write2dgray

rrApprentice

Seattle, WA

Some chargers, the iChargers are the only ones I know of for certain, can throttle back the charge rate if the balancers can't keep up.

For example, if a 2A charge rate is set, but one of the cells reaches 4.20V before the others, then the balancer will bleed current from that cell while the other cells continue to charge. The charger will recognize if the balancer is not able to keep the cell at 4.20V while the others catch up, and it will throttle back on the overall charging current (reducing from 2A) until the cell can be held in check by the balancers until the balancing operation is complete. This allows for safe charging at >1C rates with any cells without fear of causing some cells to reach an over 4.20V condition.

- David
 

12-11-2008 10:24 PM  10 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
how many watts should charger have for 6s 2500mah pack
clay7160 4 967 12-11-2008 10:24 PM
write2dgray
write2dgray

rrApprentice

Seattle, WA

Slight correction and addition to the calcs above...

6S Lipos charge to 4.20V * 6S = 25.2V
To charge at 1C requires 25.2V * 2.5A = 63W output

To charge at 2C, which I'd recommend to reduce charge times to ~25 minutes:

25.2V*5A = 126W

I'd say you're going to want a charger that is capable of at least 125W output to allow charging at 2C rates. I'd recommend taking a look at the iCharger 106B+, it's capable of 250W output (6S at 10A!) and costs about the same price as the ThunderPower 610C which is only rated at 80W. I believe the iChargers offer more watts/$ than any other chargers on the market.

Lipos are now out that allow charging at 5C rates. I predict more and more users will be looking for a little more than the 50-80W that most 6S chargers offer. At 50W you are limited to less than a 2 amp charge rate with 6S lipos.

- David
 

12-02-2008 11:52 PM  10 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Comprehensive List of Batteries, Chargers, Motors, ESC, Gyros, etc. w/ Specifications ­čôĚ ( page 1 2 )
write2dgray 23 2791 06-01-2011 09:39 PM
ProgressiveRC
write2dgray

rrApprentice

Seattle, WA

You're welcome - here's the snapshot of where things stand:

 

12-02-2008 11:39 PM  10 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Cost to charge LiPo.
Murph 6 1468 12-02-2008 11:39 PM
write2dgray
write2dgray

rrApprentice

Seattle, WA

I've recently been playing with a Kill A Watt meter that was given to me. My average cost per kiloWatt-hour is $.062. I charged 1S 10Ah and 3S 2.2 Ah cells all day and used less than 1/2 a KWH. That is less than three cents spent. The electricity used when charging is hella cheap.
 

11-22-2008 10:01 PM  10 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Comprehensive List of Batteries, Chargers, Motors, ESC, Gyros, etc. w/ Specifications ­čôĚ ( page 1 2 )
write2dgray 23 2791 06-01-2011 09:39 PM
ProgressiveRC
write2dgray

rrApprentice

Seattle, WA

Lists Updated 11/22
The RC product lists have received a long overdue update with tons of added products and updated prices. Here are just a few of the products now listed:
  • Many new motors including Reaper Brushless and new stuff from Scorpion
  • Batteries: Added Thunder Power "Pro Power" and "ProLite V2," new CellPro Red Label, updated LiFE pricing and links
  • Added FMA Direct Quazar ESCs
  • 74 new chargers including new iChargers, Graupner, Bantam, and MegaPower
There is now a column added for the 2,000+ batteries which shows the max. continuous recommended current draw (Cont. A) for any given battery.

A column has also been added to many of the pages for product manuals and many links are now populated.

Attached is an updated recap of the information listed by product type.
 

11-16-2008 01:46 AM  10 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
What charger should I buy???? ( page 1 2 )
jameswill4 31 1752 11-30-2008 04:47 PM
ren
write2dgray

rrApprentice

Seattle, WA

Check this post out:

http://www.rcgroups.com/forums/show...6&postcount=105

I believe it was rated at 300W input power, gotta read the fine print in the FMA manuals. I'm not really sure what the max. sustained output power is..
 

11-10-2008 05:37 PM  10 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
What charger should I buy???? ( page 1 2 )
jameswill4 31 1752 11-30-2008 04:47 PM
ren
write2dgray

rrApprentice

Seattle, WA

The issue with the Kong Power and other low watt rated chargers is that although it is rated at 6S and 5 amps it is only good to 100 watts. While 100 watts is better than most of the competition including the TP610C (80W), Bantam BC6 (50W) and the Cell Pro 4/Multi4 (50W), with 100W a 6S charge would be limited to less than 4 amps (100W/25.2V). With one of the 50W chargers a 6S charge would be limited to less than 2 amps by the low total power that the charger is able to deliver.

This issue is even more apparent on chargers like the Cellpro 10S (160W) where charge rates are limited from the max. of 10A by the low total power (160W) to a max. charge rate of 3.8 amps! (160W/42V)

Few chargers are designed with this in mind, but the iCharger 106B+ is capable of delivering full current (10A) at up to the max. cell count; i.e. the iCharger 106B+ is rated at 250W and can deliver 10A for a 6 cell lipo at 25V. This allows for plenty of power on hand for charging larger packs, fast charging A123s, as well as parallel and balance charging solutions for quickly charging multiple packs at once.

- David
 

11-04-2008 06:44 PM  10 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Home charging system for multiple 3s Li-Po's ( page 1 2 )
RaptorBee 35 1167 11-06-2008 08:01 PM
USNAviationjay
write2dgray

rrApprentice

Seattle, WA

Yes sir, I think of it this way, charging is limited by:

- Up to max. cell count (S)
- Up to max. current (A)
- As long as set cell count and current does not exceed max. power of charger (W)

The final figure (W) is calculated for LiPos by taking the cell count x max. charge voltage (4.20V) x charge rate (A); i.e. for 6S lipo at 5 amp charge rate = 6*4.20V*5A = 126 watts. So you would need a charger that can supply at least 126 watts continuous to power this charge. If you were limited to 100W you could only charge a 6S at a maximum of 3.97A (100W/(6*4.20V)).

- David
 

11-04-2008 06:05 PM  10 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
What charger should I buy???? ( page 1 2 )
jameswill4 31 1752 11-30-2008 04:47 PM
ren
write2dgray

rrApprentice

Seattle, WA

...at what cost $$$?
 

11-04-2008 06:05 PM  10 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Home charging system for multiple 3s Li-Po's ( page 1 2 )
RaptorBee 35 1167 11-06-2008 08:01 PM
USNAviationjay
write2dgray

rrApprentice

Seattle, WA

Take a look at this thread here which does a good job of breaking down parallel and series charging:

http://www.rcgroups.com/forums/showthread.php?t=932319

To answer your question though, (4) 3S packs in parallel would look like 3Sx4P or 11.1V at the combined capacity. It's like a hooking an "equalization hose up between four buckets of water = parallel," not like "stacking four buckets on top of each other = serial." Combined in parallel you can take advantage of the high charge rate and max. power (250W) of the iCharger to take a combined (parallel) capacity of say 10,000 mAh and charge at 1C (=10A).

The math says you could take a 6S lipo at ~25V and charge at up to 10A for a total of 250W.

- David
 

11-04-2008 05:46 PM  10 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Battery and charger combo?? any but know about this one??
jameswill4 3 395 11-04-2008 05:46 PM
write2dgray
write2dgray

rrApprentice

Seattle, WA

The X6 is a great little 100W charger from what I've seen, although a few smaller MP lipos have swollen up on me in the past under light use and I've seen a few balloon at the field in 450 helis.

- David
 

11-04-2008 05:44 PM  10 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
What charger should I buy???? ( page 1 2 )
jameswill4 31 1752 11-30-2008 04:47 PM
ren
write2dgray

rrApprentice

Seattle, WA

Check out the iCharger 106B+ : it can do 6S and has over 3x the power of the TP 610C for less $. This would allow you to charge the 3300 packs at up to 3C no problem and also provides for user updates, per cell IR readings, and computer graphing if desired.

- David
 

11-04-2008 05:42 PM  10 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Home charging system for multiple 3s Li-Po's ( page 1 2 )
RaptorBee 35 1167 11-06-2008 08:01 PM
USNAviationjay
write2dgray

rrApprentice

Seattle, WA

For more power/$ than any other charger consider the iCharger 106B+ which allows for 250W of charging power at up to 10A for around $125. With this you can charge up to 6 cells or (2) 3S lipos in series at up to 10A or you could charge (4) 3S 2200 mAh lipos connected in parallel at 1C without any problem (4x2.2 Ah = 8.8 A for 1C).

Pick you up an IBM 235 power supply off E-Bay for a good 30+ amp power supply for less than $30.

This will give you plenty of power and flexibility for a long time to come.

- David
 

10-21-2008 10:54 PM  11 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Outrage XP 8S 3700 testing ­čôĚ
moshen 11 1211 10-27-2008 05:27 PM
Zaaaguy72
write2dgray

rrApprentice

Seattle, WA

What sort of issues were you having with one of the lipos and what was done to resolve it?
 

09-10-2008 11:03 PM  11 years ago
TopicTopic StarterReplyViewLast Post
Closed ••­čÜüHelicopter e-Electric Battery-Charger-pSupply
12S Question
mike658sr 2 486 09-10-2008 11:03 PM
write2dgray
write2dgray

rrApprentice

Seattle, WA

What type of balancer are you using? That is the key element to sort out. The Robbe will simply connect to the main discharge leads to charge through there, it does not provide balancing, which I assume, based on your description, is being performed by another stand-alone device.

- David
 

05-31-2008 06:19 PM  11 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Comprehensive List of Batteries, Chargers, Motors, ESC, Gyros, etc. w/ Specifications ­čôĚ ( page 1 2 )
write2dgray 23 2791 06-01-2011 09:39 PM
ProgressiveRC
write2dgray

rrApprentice

Seattle, WA

Another huge round of updates has been made to many of the lists:

http://progressiverc.com/Research.html

Revisions include newly added links for manuals, a new page for dedicated discharge devices, as well as the following category revisions:

Batteries - Lots of new brand son the market, hundreds of new 25C and 30C lipos, and some new A123 cells from K2.

Brushless Motors - Too many to list, over 300 added including many new offerings from Scorpion, Free Air, Hurricane Flight Systems, Hyperion, and dozens of smaller brands.

Brushless ESCs - New ESCs with switching BECs from many of the top manufacturers including E-Flite, AirPower, Extreme Flight, Hurricane Flight Systems, Hyperion, Mega Power (with data logging like the Jeti Spins), Mystery, Rite Hobby, and Scorpion. A field for BEC type specification has been added for ESCs to designate linear or switching type BEC. Also added are many new larger ESCs in the 60-120 amp range and some new HV ESCs.

Gyros - One dozen new gyros that have recently hit the market.

Chargers - New products from Bantam, iCharger, DN Power, E-Flite, Integy, and Schulze. A column has also been added to show input voltage range and discharge specifications.

Balancers - More than a dozen new balancers including a new offering from Bantam, models with digital displays, and a 12S, 10A balancer from MegaPower.

Too many changes to list, another small step towards providing a comprehensive list of products in this ever-changing world of RC products. Exciting times - enjoy and have fun flying!

Cheers,
David
 

05-29-2008 08:28 PM  11 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Suggestions for a charger....PLEASE HELP!! ( page 1 2 )
desulli 21 1979 06-15-2008 11:34 PM
desulli
write2dgray

rrApprentice

Seattle, WA

You may be find better responses by offering fewer, shorter, more direct questions, but I'll give it a shot:

Charger: For your charging needs and roughly the same price I would recommend a CellPro 4S

http://www.fmadirect.com/Detail.htm...2218§ion=45

or the iCharger 106B

http://www.hobbycity.com/hobbycity/...?idProduct=6792

As far as lipos on the TRex go, there are more opinions that stars in the night sky. I have been running some 3S 2200 30C packs by Electrolite that womp all over more expensive packs I have tested by TP and FP. As far as longevity, that is still to be determined, but I have 30 cycles+ going and they are holding very strong.

If you have any other specific questions please ask.

Cheers,
David
 

04-11-2008 11:01 PM  11 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
CAN A BANTAM BC6 CHARGER HANDLE 6-CELL LIPOS? or should I get the BC8?
Mr. Miyagi 3 666 04-11-2008 11:01 PM
write2dgray
write2dgray

rrApprentice

Seattle, WA

If you only want to charge at a maximum rate of 2 amps for your 6 cell lipos. I would imagine that you will be charging larger packs and will be looking for a little more power. One recommended option as outlined above would be to purchase the BC6-10 and a separate adequate power supply. This would provide more power on 6 cells than the BC8 at a lower overall cost.
 

04-11-2008 10:20 PM  11 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
CAN A BANTAM BC6 CHARGER HANDLE 6-CELL LIPOS? or should I get the BC8?
Mr. Miyagi 3 666 04-11-2008 11:01 PM
write2dgray
write2dgray

rrApprentice

Seattle, WA

A BC6 is good to 6 cells and 50 watts

At 6S you are looking for 6x3.7V = 22.2V at nominal voltage and 6x4.2 = 25.2V at full voltage. This should mean that the charger can handle a hair less than a 2 amp charge rate (50 W / 25.2 V = 1.98A max. theoretical charge rate).

If you are charging packs much bigger than 2 Ah or intend to run charge rates higher than 1C, then look for more capable charger.

This one is really limited to 50W by it's power supply. The BC6-10 (same as BC6 sans P/S) is rated to 200W and 10A and could charge a 6S at nearly 8 amps with an adequate supply.

- David
 

03-03-2008 01:05 AM  11 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Comprehensive List of Batteries, Chargers, Motors, ESC, Gyros, etc. w/ Specifications ­čôĚ ( page 1 2 )
write2dgray 23 2791 06-01-2011 09:39 PM
ProgressiveRC
write2dgray

rrApprentice

Seattle, WA

Well guys, it looks like Align will be carrying lipos with your choice of either ThunderPower or JST-XH balance connectors on their new packs. I have added all their new lipos to the lists by model number with the balance connector type indicated. Lots of other products have also been added including 100s of servos. Here's a recap of what's listed:

http://www.progressiverc.com/Research.html

Cheers,
David
 

03-03-2008 01:04 AM  11 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Comprehensive List of Batteries, Chargers, Motors, ESC, Gyros, etc. w/ Specifications ­čôĚ ( page 1 2 )
write2dgray 23 2791 06-01-2011 09:39 PM
ProgressiveRC
write2dgray

rrApprentice

Seattle, WA

Could you add a legend to the chargers list? I'm actually in the market for a new charger but I don't know what each column represents.
On the charger list the column headings are as follows:

Manufacturer : Manufacturer's name
Model : Model name of charger
S : Maximum lipo cells that can be charged in series
A : Maximum charge amps
W : Maximum charging watts
Fan : Does it have a fan? (Yes or No)
Bal. : Balancing charge? (Yes or No)
PS : Power supply(Yes or No)and capacity if available
NiMH/NiCD : maximum NiMh/NiCD cells that can be charged
LiFe : LiFePO4 compativle? (Yes or No)
Outputs : Number of Outputs
Price : Lowest available price
Comments : Any additional comments
Link : link to product purchase and information

I hope this helps! Let me know if you have any other questions.

- David
 

02-19-2008 04:10 AM  11 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Comprehensive List of Batteries, Chargers, Motors, ESC, Gyros, etc. w/ Specifications ­čôĚ ( page 1 2 )
write2dgray 23 2791 06-01-2011 09:39 PM
ProgressiveRC
write2dgray

rrApprentice

Seattle, WA

Hey guys - you are welcome! I am glad you have found the information useful.

I just got through updating the lists with many new lipos, ESCs, and motors. All the brushless motors from E-Flite have been added to the list as well as the complete updated line from Medusa Research. There are now over 1400 different motors listed! Let me know if you guys see anything else that needs to get added and help me and your fellow hobbyists out by posting up a link.

http://www.progressiverc.com/Research.html

Cheers,
David
 

02-03-2008 01:57 AM  11 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Comprehensive List of Batteries, Chargers, Motors, ESC, Gyros, etc. w/ Specifications ­čôĚ ( page 1 2 )
write2dgray 23 2791 06-01-2011 09:39 PM
ProgressiveRC
write2dgray

rrApprentice

Seattle, WA

You are very welcome! All the lists have been recently updated to include many new products and the motor list has been expanded to include every motor from Hobbycity/United Hobbies. The complete lines from many other manufacturers including Mega Motors, MP Jet, MicroDAN, Torcman, Suppo, Turnigy were added and there are now over 1200 motors listed in total. Columns can be sorted in the spreadsheets by clicking on the column headings. Enjoy!

http://www.progressiverc.com/Research.html

Here's a snapshot of what's currently listed:

- David
 

01-13-2008 01:49 AM  11 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Comprehensive List of Batteries, Chargers, Motors, ESC, Gyros, etc. w/ Specifications ­čôĚ ( page 1 2 )
write2dgray 23 2791 06-01-2011 09:39 PM
ProgressiveRC
write2dgray

rrApprentice

Seattle, WA

Glad I could help out guys!

The latest lipos from DualSky and the Cellpro Revolectrix Black Label line have been added as well as hundreds of additional brushless motors and ESCs. Here are the current counts for each list:

 

01-05-2008 09:50 PM  11 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Comprehensive List of Batteries, Chargers, Motors, ESC, Gyros, etc. w/ Specifications ­čôĚ ( page 1 2 )
write2dgray 23 2791 06-01-2011 09:39 PM
ProgressiveRC
write2dgray

rrApprentice

Seattle, WA

I have made some major updates to the lists to include a lot of new products and pricing on lipos and other electric flight components. Many new brushless motors have been added including the complete line from AXI, HiMax, Hyperion, Neu, Plettenburg, Razor, RS-Motoren, Scorpion, and a few others. Let me know if you see any I missed and I'll continue to add to the lists. Enjoy!

http://www.progressiverc.com/Research.html

 

12-16-2007 05:44 PM  11 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Comprehensive List of Batteries, Chargers, Motors, ESC, Gyros, etc. w/ Specifications ­čôĚ ( page 1 2 )
write2dgray 23 2791 06-01-2011 09:39 PM
ProgressiveRC
write2dgray

rrApprentice

Seattle, WA

I have added the balance connector type as part of the description for each battery as suggested by another user. Here is a partial screenshot of the 3S LiPo battery list filtered by "2100 mAh" and sorted by mAh per gram as an example of what's available:

If you see any updates or revisions that need to be made please let me know.

Cheers!
David
 

11-22-2007 12:27 AM  11 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Comprehensive List of Batteries, Chargers, Motors, ESC, Gyros, etc. w/ Specifications ­čôĚ ( page 1 2 )
write2dgray 23 2791 06-01-2011 09:39 PM
ProgressiveRC
write2dgray

rrApprentice

Seattle, WA

Great guys - I'm glad you've found it useful!

I have made some major updates to the lipo lists which now include over 1200 individual batteries, all of which can be filtered and sorted by any specification.

Let me know if you see any batteries that are missing or if any stats need to be corrected and I will edit the interactive spreadsheets.

- David
 

11-21-2007 09:56 PM  11 years ago
Topic Vote0Post 1
Topic Opening Post
Topic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Comprehensive List of Batteries, Chargers, Motors, ESC, Gyros, etc. w/ Specifications ­čôĚ ( page 1 2 )
write2dgray 23 2791 06-01-2011 09:39 PM
ProgressiveRC
write2dgray

rrApprentice

Seattle, WA

Comprehensive List of Batteries, Chargers, Motors, ESC, Gyros, etc. w/ Specifications
With the hundreds of battery choices that are out there these days it has become an exhaustive task to even locate all the product options which exist.

In order to save everyone the time of seeking out information on all the available lipo batteries out there, I decided to share the data that I have compiled which includes a comprehensive list of every available lipo from 2S and 150 mAh to 15S and 10,000 mAh. All the major brands are included such as Thunder Power, FlightPower, Kong Power, Hyperion, CommonSenseRC, TrueRC, Tenergy, AirThunder, MaxAmps, PolyQuest, Neu, Tanic, etc.

Other lists are offered for gyros, motors, ESCs, BECs, transmitters, etc.

It is in spreadsheet format and allows you to sort by headings as well as filter the given results. Outside of normal statistics (weight, dimensions, price, etc.) there are columns which allow you to sort to determine which battery offers the most bang for the buck (capacity per dollar) or capacity per weight (mAh/gram).

The product lists will be updated frequently with new products as they become available. Check it out here:

http://progressiverc.com/Research.html

Feedback on this work in progress would be greatly appreciated. Please let me know what you would like to see added and information posted in this thread will be updated to the website. So, if you'd like to see a product that I am missing, you see a stat that is wrong, or if you know where you can find an item for a lower price please post it here.

Cheers,
David
 

11-20-2007 04:27 PM  11 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Battery recommendation for aging GWS Dragonfly?
saeba 2 776 11-21-2007 03:24 AM
saeba
write2dgray

rrApprentice

Seattle, WA

I recently put together a nearly complete list of every available lipo with it's size, weight, and price and decided to share it online to save other people the time and trouble. You can check it out here:

http://www.progressiverc.com/Research.html

The columns in the spreadsheets are sortable by clicking on them and you can filter the results to 1200 mAh by searching for 1200 under the "mAh" column. There are many available batteries in the 2S/1200 mAh size, hopefully this helps speed up your search!

- David
 

11-20-2007 04:25 PM  11 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Need Some Help in Battery Selection
Donald D. 5 551 11-20-2007 04:25 PM
write2dgray
write2dgray

rrApprentice

Seattle, WA

Donald,

I recently put together a full list of batteries which shows every 3S 2100 mAh option available for your Rex. It may help in your search, I posted it on my site here:

http://www.progressiverc.com/Research.html

The columns are sortable by clicking on the column headings and you can filter by searching for 2100 under "mAh."

There are also other spreadsheets with lists of available chargers and balancers. Good luck in your search and welcome back to the hobby!

Cheers,
David
 

11-06-2007 11:03 PM  11 years ago
TopicTopic StarterReplyViewLast Post
••­čÜüHelicopter e-Electric Battery-Charger-pSupply
Common Sense RC Batteries ­čôĚ
Old Blade Man 1 497 11-06-2007 11:03 PM
write2dgray
write2dgray

rrApprentice

Seattle, WA

I used a couple in an E-Sky Honeybee FP2 heli with great success. CSRC provides a great value for this size lipo, although I prefer the 10C version which is only slightly more expensive. For a good list of batteries and comparitive weight/cost/capacity data you can check out this link for a fairly comprehensive list of the batteries that are made:

http://progressiverc.com/Research.html

Let me know if you need more specific information on the CSRC 2S 8C 800 mAh, I found that they were everything they are rated to be.

Cheers,
David
 
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