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› Why the need for an "expensive" charger?
02-10-2008 07:48 AM  10 years agoPost 1
vifferd

rrNovice

Portland OR

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As I understand it, you can't safely charge li-po's any faster than one hour! Ie: can only safely charge a 2100mhA batt at more than 2.1 Amps. An expensive charger seems to be a waste of money if it does not keep you in the air more often? (This is of course assuming that you have a factory ogirinal charger AND balancer!)
Just wondering.

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02-10-2008 01:24 PM  10 years agoPost 2
stanc

rrKey Veteran

Conroe, TX

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When you fly what your flying, there probably isn't any need. But if you were to buy an electric heli that uses more than a 2S or 3S pack, like 10S or 12S, then you need a good charger and balancer. There is a lot of difference in the cost of a Blade 400 and a MA IonX (10S/12S), Trex 600(6S/10S), Raptor e620(10S) and a lot of difference in the cost of the packs.

Stan

Stan
2- Logo 500
Ion X2
eAvro90

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02-10-2008 07:53 PM  10 years agoPost 3
Rob_T

rrElite Veteran

..

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If you're just flying 3S 2100 (or similar) battery packs, I agree, a thousand dollar Schulze would be total overkill. But what the cheap (often supplied with the model) chargers lack is any display of voltage or current. Without the display, you have no idea how much you're taking out of your batteries and so eventually you are likely to push too hard and over discharge a battery and kill it. There are a lot of chargers in the $100 range that will give you the display.

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02-10-2008 08:06 PM  10 years agoPost 4
Invrted1

rrVeteran

Cincinnati, Ohio

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Cheezeball heli's can use cheezeball chargers no problem. But like others have said, if you have an investment in your batts, you should protect them with an investment in a good charger.

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02-10-2008 08:47 PM  10 years agoPost 5
vifferd

rrNovice

Portland OR

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Ok, so what you are saying is that if you spent a LOT of $ on batt's THEN it is worth the $!?? Is that the summary?
Thanks ahead of time!

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02-10-2008 09:02 PM  10 years agoPost 6
Gyronut

rrProfessor

Martinsville In.

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If your just messin around right now then a decent charger isnt going to do you any good.

I know how I felt about it a few years ago and then I got hooked on them. In fact just bought a high end charger just last week so I have made the commitment to stay in it for a long time.

How bout you..??

Rick

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02-10-2008 09:27 PM  10 years agoPost 7
fenderstrat

rrProfessor

Aston,Pa

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the new battery and charger technology is allowing charge rates of 2 and 3C, factory approved(FMA T/P)....I've been charging at 3C for months....no damage to batts, safe and batteries done in 25 min or less.....you need the right set up to charge at more than 1C

better chargers also give you all the info you need...such as pack and cell V...and MAH put back in,charge rates...battery level......and you dont need to spend big $$$ to get this

Compass helis Support Team
PerformancePlusRC field rep
Mini Titan/SE
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02-10-2008 09:42 PM  10 years agoPost 8
vifferd

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Portland OR

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Sorry but what does the "C" mean. I've seen it. And what you are saying is that at a higher C you CAN 'quick' charge your lipo batts?!??

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02-10-2008 10:07 PM  10 years agoPost 9
Invrted1

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Cincinnati, Ohio

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The C refers to capacity of the battery. Charging a 2000ma batt at 1C means to charge it at 2000ma. 1.5C would be 3000ma and so on.

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02-11-2008 05:09 PM  10 years agoPost 10
TPChris

rrNovice

Earth

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It really has nothing to do with how fast you can charge your battery. Rather, it has to do with what the charger can do for you.

O.K. chargers do just that...charge. Good chargers not only charge but also discharge as well as give you data about your pack. Great chargers do that and are capable of multiple chemistries. Fantastic chargers perform feedback balance charging, which is currently the ultimate in safety. This charge method uses data from the balancer to control the charger. You do not have to spend a lot to get this either. There are chargers available for as little as $130 that balance/charge.

Understand that even though a charger/balancer may make it safe to charge at greater than 1C, there is still a price to pay for doing this. That price comes down the road in the form of fewer life cycles.

Chris

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02-12-2008 02:50 AM  10 years agoPost 11
fenderstrat

rrProfessor

Aston,Pa

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There are chargers available for as little as $130 that balance/charge.
the FMA cellpro4s
...is a balance charger and its 75 dollars...gives you all info you need while charging........I only sport fly...but I have been charging at 2 and 3C for months and some of my batteries have 300+ cycles
from the CELLPRO site

n In 3.0C LiPo 4.20V Mode, LiPo/Li-Ion cells are individually charged to 4.2V per cell.
Charge current is automatically set to 3 times capacity. Typical charge time for packs
under 1.5Ah is 30 minutes. Cycle life on high discharge packs (12C and greater) is not affected
by the Cell Pro 3C charge current.

http://www.fmadirect.com/detail.htm?item=2218§ion=45

the only negatives of this charger are its lipo only and it doesn't discharge,but I never needed to discharge lipos anyway so that part is no big deal,as every discharge cycyle is one less flight out of the batt

Compass helis Support Team
PerformancePlusRC field rep
Mini Titan/SE
TEAM KBDD

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02-12-2008 07:46 PM  10 years agoPost 12
jester4

rrKey Veteran

Brampton, Ontario

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For the $75 price tag, those cellpro chargers look real nice! I'm thinking of picking one up for myself, but here in Canada it will probably cost 150!!

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02-12-2008 08:33 PM  10 years agoPost 13
gftazz

rrVeteran

upstate N.Y. in the Adirondacks

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For the money you can't beat the CellPro4 charger.
It is plug and play just turn it on and then plug yout battery type into the board you need that does many different types of battery ballance cords. This charger charges through the ballance plug so it self ballances and reads out each cell individually and gives charge rate and voltage and how many mah you are putting back in. Just plug the battery in and the charger reads everything and you can see on the screen what present voltage is and how much each cell has left in them before it starts the charge. It also has a neat COLD/HOT function built in so it senses/reads battery/atmosphere temperature and self adjusts for hot or cold charging so as not to harm the battery. If I remember right you can get done with a flight and Immediately start charging it without waiting for the battery to cool down like on most chargers.
I have 2 of them and my flying buds have them too. Nice if they made a CellPro6 maybe they do or will soon for the Trex500.

Tom

Oh No Someone Please Stop Me Before I Go Broke With This Heli Thing!!

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02-12-2008 08:44 PM  10 years agoPost 14
coptercptn

rrElite Veteran

Mesa AZ. USA

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I have to agree with stan and Rob et al..the more expensive the batteries the more you NEED to put into the Charger that maintains them. Also with the new Lithium-manganese technology,(AKA Kong power/Air Thunder) the ability to run the pack WAY down requires a charger that can recharge them. The cheap units (and even a few of the pricier ones) will not do that...

Home of the "Sea Cobra".....

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02-12-2008 09:19 PM  10 years agoPost 15
MrMel

rrProfessor

Gotland

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As I understand it, you can't safely charge li-po's any faster than one hour! Ie: can only safely charge a 2100mhA batt at more than 2.1 Amps
Thats the part where your wrong, with a GOOD balancing solution you can, and with good I mean one that will cut the charge if a cell go out of wack.

Thats why you need larger chargers.

Thing is that everything is calculated in watts (which is volt * amps), so for your 3s pack which only has 12.6v fully loaded it dont take much to charge at 3C (3 x amps of battery), but for a 10s charger it needs to charge 42volt * XX amps = high watts.

For sample my e-station 902 which can do around 190 watts, can only do 3.9amp on my 12s pack, where it can do 7.8amp on a 6s pack.
Also with the new Lithium-manganese technology,(AKA Kong power/Air Thunder)
Dont think AT/KP is LiMn packs, LiMn is non-flammable, AT/KP is NOT that, perhaps its a simular chemistry, but its not classic LiMn.

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02-12-2008 09:36 PM  10 years agoPost 16
coptercptn

rrElite Veteran

Mesa AZ. USA

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not sure of the "Pure chemistry" Mel but I've been told (By AT) that it is, in fact, manganese construction...

Home of the "Sea Cobra".....

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02-12-2008 09:43 PM  10 years agoPost 17
MrMel

rrProfessor

Gotland

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Yep, can very well be, but shouldnt be mixed up with duralite LiMn which is sold as inflammable.

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