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Electric Battery-Charger-pSupply
› CHARGER TO CHARGE 2 3S LIPO AT SAME TIME
01-12-2010 06:40 PM  8 years agoPost 21
mlucia

rrKey Veteran

Essex Jct., Vermont

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Rogman88
Wow that is the best charger I've seen! At 360$ I don't know how many folks could drop that much $ at one sitting but it's like getting 2-4 chargers in one! What power supply do you use?
I'm not rich but also think 360 is not bad for what you are getting in that charger. It is very versatile, nicely made, easy to navigate, it has been a work horse and has never failed me once. I use a pyramid 30A power supply for home charging.
Plus...if anything does go wrong I know I can call Evan and he will make it right.

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01-12-2010 07:50 PM  8 years agoPost 22
HeliMan Dave

rrVeteran

Suburban Chicago

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That Bantam BC8DX charger has a max of only 160W per port. If you ever decide to (or think you might) go with bigger packs, you'll wish you had a more powerful charger.

If you're really only going to charge 3s, I'd suggest looking at the Duo 3 (cheaper and 180W per port). The new, yet to be released "super duo" is supposed to be 300W.

So far, the most powerful charger I've found is the i208b i-charger putting out 350W but it's not dual output.

That power is not necessary if you're into small electrics but I'm using 6s 5000mAh packs.

Diabolo 700UL / Logo 700 / 600 / 500 V-Bar NEO / Oxy 2 / Blade 180CFX / mCPX BL / Nano / V-Control

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01-12-2010 08:19 PM  8 years agoPost 23
mlucia

rrKey Veteran

Essex Jct., Vermont

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That power is not necessary if you're into small electrics but I'm using 6s 5000mAh packs.
I just got 4 in the mail so you may be right....we will see
Have been happy charging my 6s 2650's.

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01-12-2010 08:49 PM  8 years agoPost 24
TJinGuy

rrProfessor

Socorro, NM - USA

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The simple problem I have with the 2 current "Dual" chargers is the cost vs output. For about 2/3rds the cost of a Dual charger you can have a pair of iCharger 106B+ chargers at 250W each. Plus each charger is tiny compared to the dual models. I think it is just a really hard combo to beat.

- Chris

Team New Mexico
TJinTech

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01-12-2010 11:27 PM  8 years agoPost 25
Ace Dude

rrProfessor

USA

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The simple problem I have with the 2 current "Dual" chargers is the cost vs output. For about 2/3rds the cost of a Dual charger you can have a pair of iCharger 106B+ chargers at 250W each. Plus each charger is tiny compared to the dual models. I think it is just a really hard combo to beat.
Assuming you're referring to the the Hyperion DUO3 the DUO3 is actually cheaper than your recommended solution.

From the main iCharger reseller in the USA:
2 iCharger 106B+ chargers + $9.85 for domestic shipping = $259.68
2 Polyquest Balance Boards = $19.98
Total = $279.66

From one of the main Hyperion dealers in the USA:
1 Hyperion DUO 3 charger = $298.98
Free shipping for all orders over $100
2 Polyquest balance boards included.
With usual 10% off coupon code = $269.08
Total = $269.08

  

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01-12-2010 11:55 PM  8 years agoPost 26
TJinGuy

rrProfessor

Socorro, NM - USA

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Total cost for a pair of iChargers is $239.98 shipped free from Progressiverc and no need for balance boards as JST-XH connectors are built in. Not bad for 500W of output.

- Chris

Team New Mexico
TJinTech

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01-13-2010 01:00 AM  8 years agoPost 27
Ace Dude

rrProfessor

USA

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Total cost for a pair of iChargers is $239.98 shipped free from Progressiverc and no need for balance boards as JST-XH connectors are built in. Not bad for 500W of output.
Funny, my shopping cart shows $259.68.

Perhaps you can show us the mathematical proof for 2/3(269.08) = 259.68?

  

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01-13-2010 01:48 AM  8 years agoPost 28
TJinGuy

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Socorro, NM - USA

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Man you just really dig for the truth don't you? First you try to call me out on not posting up the drawbacks of parallel charging, now you miss the free shipping option and compare a normally $300 charger to the wrong thing AGAIN. How about changing the shipping option to "Second iCharger - Free Shipping!"? That gives me a nice neat $239.98.

I am glad the Duo is on sale right now but I did not say Duo, I said "Dual" charger. I was going to the average of the costs of the 2 available. I guess that was not a proper choice on my part. So how about I just say "For cheaper" now that I have outlined the intricacies of choosing free shipping.

---
That is enough about this. I believe the answer to the OP's question was answered long ago. As for parallel charging, we both made out cases and it is up to the pilots to decide what it best for them. And finally on the Duo vs other options discussion, no one will disagree that the Duo is a nice charger but it is one of the most expensive lipo chargers available and is not easily attainable for all. Please consider that fact as you firmly point people in that direction again and again.

- Chris

Team New Mexico
TJinTech

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01-15-2010 11:57 AM  8 years agoPost 29
neale

rrApprentice

BRISBANE ,Australia

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Well said,many pilots are not, for many different reasons able to spend as they please. And if I can do something with just a little extra effort and enjoy this hobby without spending the dollars that can go to other areas, I will do it.

Have money pit,but small shovel !!

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01-18-2010 02:52 PM  8 years agoPost 30
Ace Dude

rrProfessor

USA

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FMA has weighed in and acknowledges the safety issues associated with parallel charging. They've even created a Smart Parallel Adapter for their new FMA PowerLab 8 charger.

http://www.rcgroups.com/forums/show...5&postcount=111

  

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01-18-2010 03:25 PM  8 years agoPost 31
bowies12

rrApprentice

Surrey - UK

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I've got a 2s2p 3600 Mah flightpower battery. They obviously think parallel charging is safe.

Fat birds can't fly

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01-18-2010 04:35 PM  8 years agoPost 32
TJinGuy

rrProfessor

Socorro, NM - USA

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Congrats Ace I guess you finally have proof that parallel charging is unsafe, although it is only "kind of" unsafe since they are making a special adapter to parallel charge.

But oh wait I don't believe it is unsafe at all and I do it every time I charge. I guess we all do things our own way.

- Chris

Team New Mexico
TJinTech

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01-18-2010 05:23 PM  8 years agoPost 33
Ace Dude

rrProfessor

USA

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Congrats Ace I guess you finally have proof that parallel charging is unsafe, although it is only "kind of" unsafe since they are making a special adapter to parallel charge.
Not really. Those in the know have known this all along.
But oh wait I don't believe it is unsafe at all and I do it every time I charge.
Ignorance is bliss.

  

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01-18-2010 06:11 PM  8 years agoPost 34
bowies12

rrApprentice

Surrey - UK

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AceDude,

If parallel charging is so dangerous, why then do the manufacturers actually make and sell batteries configured in parallel.

My battery can only be charged in parallel.

You are totally correct that Ignorance is bliss!
I and many others will continue to charge in parallel. You can continue to charge singly.

Fat birds can't fly

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01-18-2010 07:03 PM  8 years agoPost 35
Ace Dude

rrProfessor

USA

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He's talking about charging multiple packs in parallel.

Not a single pack typically made from matched cells from the same batch and of the same capacity, and having an identical age and charge/discharge history which is what you have.

  

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01-19-2010 12:14 AM  8 years agoPost 36
bowies12

rrApprentice

Surrey - UK

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This may be true but quite irrelevant. My 2 cells in parallel with another 2 cells all in 1 pack are electrically identical to 2 seperate packs in parallel.

Its well documented that with parallel charging the cells even out, even when they are at different discharge levels to begin with, though as TJ advised it is probably not advisable to charge a full pack with an empty pack.

I know several in our club charge in parallel and proved the concept reliable

Fat birds can't fly

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01-19-2010 12:33 AM  8 years agoPost 37
TJinGuy

rrProfessor

Socorro, NM - USA

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Its well documented that with parallel charging the cells even out, even when they are at different discharge levels to begin with
It's basic electric circuits, it's not rocket science. The fundamental concepts are extremely simple. When you connect 2 batteries in parallel, they immediately become the same voltage PERIOD. If there is a difference in the resting voltage of the a batteries, then current flows from the high to the low battery until the resting voltages are the same. Because of this fundamental electric concept, when 2 or more packs are placed in parallel (both main and balance leads) and charged, all the cells are balance charged to 4.2V, period. There are no ifs, ands or buts, it just works ... PERIOD.

- Chris

Team New Mexico
TJinTech

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01-19-2010 01:55 AM  8 years agoPost 38
Ace Dude

rrProfessor

USA

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Maybe you guys could call FMA and explain the "fundamental concepts" to them and tell them how and why "Smart Parallel Adapter" is totally unnecessary. I'm sure they'd really appreciate it. I can't imagine all the R&D $$$ they've spent on such a totally unnecessary product. Also, with all the money you'll be saving them perhaps they'll send a few chargers (without SPAs, of course) your way.

In the meantime I'll contact Tim to see if I can get on the conference call.

  

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01-19-2010 05:21 AM  8 years agoPost 39
TJinGuy

rrProfessor

Socorro, NM - USA

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Ace stick a sock in it man, you can not win. If you don't like it, don't do it but leave others to do as they please. Now go troll some other thread.

- Chris

Team New Mexico
TJinTech

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01-19-2010 02:16 PM  8 years agoPost 40
Ace Dude

rrProfessor

USA

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Chris, it's never been about winning and it's unfortunate you see it as such. It's about sharing knowledge and information so modelers can make informed decisions on what's best for them. Making the best decisions can only be done by having all the information available and not just one person's biased opinion.

For those interested in learning more about how the Smart Parallel Adapter works and how parallel charging can be made safer Tim has posted some information on how the SPA works and the safety features incorporated here:

http://www.rcgroups.com/forums/show...6&postcount=135

http://www.rcgroups.com/forums/show...7&postcount=139

  

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