Thread: lipo batteries
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Old 2010-08-03
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Hi Hadi,

Also keep in mind that greater capacity "Higher mAh" can supply you with greater sustained amps while maintaining a proper voltage level, meaning (In theory):

(mAh of lipo * C Value)/1000 = Continuous discharge Amps

A 20C 1300mAh pack = 20C *1.3Amps(1300mAh) = 26 Continuous Amps
A 20C 1800mAh pack = 20C *1.8Amps(1800mAh) = 36 Continuous Amps

Be sure to check your electric motor specifications and choose a lipo pack that can supply the needed amps. Remember, higher C ratings are good for high-power applications, however, they are simply overkill for many trainer type applications. Like it has been mentionned, the higher the C-rating the heavier an equivalent pack becomes! Let us imagine a 45C 1800mAh pack:

45C *1.8Amps = 81 Continuous Amps!!!!!!!!!!! (So, like BurningHead said, keep the C-rating as well as the capacity in mind. And remember, a higher capacity (meaning greater mAh)lipo will also maintain a higher voltage under load throughout your entire flight versus an equivalent voltage lower capacity lipo pack which in turn means more power because Voltage*Amps=Watts and the more watts, the more power. Watch the AUW of the aircraft, and find a suitable balance, meaning a battery that can supply the amps without going overboard with the C-rating and give you tolerable flight times without sacrificing weight (Although a bit of weight is good on windy days!). There is a lot more to this, anyhow...Hope that helps! Good Luck

Last edited by RichR; 2010-08-03 at 06:10 AM.
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