how to choose the right lipo
10-13-2005, 05:39 PM
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how to choose the right lipo
I just purchased a shogun heli and I have several other models that use Lipo batteries. Can someone point me to a site or page that would help me to understand how mah, discharge rate, and motor draw relate and how to pick the right lipo battery for a particular application.
10-13-2005, 05:55 PM
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RE: how to choose the right lipo
i looked quickly for a good thread or site, but gave up quickly. here are the basics:
capacity times discharge rating should be greater than your motor's amp draw
example 2000mAh x 10C (units of 1/hr) = 20,000 mA = 20 amps max current
or another common one:
1320mAh x 15C = 19,800 milliamps = 19.8 amps max
but no matter what discharge rating a lipo has, you should never charge it faster than 1C (charging should take 1 hour minimum).
"how to pick the right lipo battery for a particular application.": you should first have a good idea of how many amps your motor will draw. manufacturer data is usually the best place to start. then find a battery that will handle the current.
just don't forget about flight time, a 1000 mAh 20C pack will handle 20 amps, but only for 3 minutes. (1000mAh / 20000mA = .05 hr = 3 min)
browse the ALL FORUMS>>ELECTRIC FLIGHT>>POWER SOURCES and you may find a few threads that better address this than i just did.
capacity times discharge rating should be greater than your motor's amp draw
example 2000mAh x 10C (units of 1/hr) = 20,000 mA = 20 amps max current
or another common one:
1320mAh x 15C = 19,800 milliamps = 19.8 amps max
but no matter what discharge rating a lipo has, you should never charge it faster than 1C (charging should take 1 hour minimum).
"how to pick the right lipo battery for a particular application.": you should first have a good idea of how many amps your motor will draw. manufacturer data is usually the best place to start. then find a battery that will handle the current.
just don't forget about flight time, a 1000 mAh 20C pack will handle 20 amps, but only for 3 minutes. (1000mAh / 20000mA = .05 hr = 3 min)
browse the ALL FORUMS>>ELECTRIC FLIGHT>>POWER SOURCES and you may find a few threads that better address this than i just did.
