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03-18-2009 01:52 PM  8 years agoPost 1
jake21

rrApprentice

ontario canada

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Which battery is better with the same MAH rating and why?
This would be for a 50 size heli with all 9252 servos.
Thanks.

The only way to not crash is up

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03-18-2009 01:54 PM  8 years agoPost 2
BarracudaHockey

rrMaster

Jacksonville FL

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Yes

(ie: it doesn't really matter)

Andy
AMA 77227
http://www.jaxrc.com

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03-18-2009 02:48 PM  8 years agoPost 3
Pinecone

rrKey Veteran

Maryalnd

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Some NiMH cells are not good in higher draw applications. So, not the best choice for a flight pack.

But if they are sold as a flight pack battery, they will be fine, either one.

Terry
Blade CP Trex 450 SE
QJ EP8v2 EX Gaui Hurricane 550
Vibe 50 Bergen Intrepid Gasser

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03-18-2009 03:04 PM  8 years agoPost 4
Kevin Dalrymple

rrKey Veteran

Indianapolis

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Get a liPo with a reg. Thats the best and about the same price in the end.

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03-20-2009 04:32 AM  8 years agoPost 5
Wyn

rrApprentice

Oregon, USA

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By better, I'm presuming you mean maintaining voltage with high current servos. In this respect, the cell chemistry doesn't matter. In fact, as far as voltage under load is concerned, the maH doesn't matter either. Only the cell impedance (aka internal resistance) matters. The resistance of the connectors, wiring, & switch harness also matter, but that's added to whatever voltage drop occurs within the battery itself.

So, either cell chemistry can be used to make a high current battery (low impedance) battery. But, as batteries age (or get damaged), their impedance goes up. Perhaps another way to ask the question is: How can one tell if a particular battery is suitable for the servo current? For myself, measuring the actual peak low voltage under servo load is the best way to see if a battery, or regulator, is capable enough for the servos.

Wyn
VoltMagic

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03-22-2009 05:45 PM  8 years agoPost 6
Flyinhelis

rrApprentice

USA - So. Cal. the​OC

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Do not go with Nimh, I have used them as on the receiver and had false full charge readings during charging. These batteries require you to monitor the charge as peak detection does not work with them.

I still fly the Nicad sub C 2400mah on all digital servos, I test the battery every flight under load 1.5amp. I get about 2-3 flights then recharge, this is ok for me since I have limited flying time.

Eventually, everyone will be flying Lipos or newer battery technology - order type batteries are getting harder to find.

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03-23-2009 07:47 AM  8 years agoPost 7
tadawson

rrElite Veteran

Lewisville, TX

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I would have to say that false peaking is a factor of using either a bad or inappropriate charger. A NiCd charger won't correctly peak a NiMH, but then again, it isn't supposed to . . . .

Myself, I have been using a pretty even mix of the two, and my chargers don't false peak on either . . . .

- Tim

Friends don't let friends become electrotarded . . . .

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