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Old May 06, 2012, 11:26 AM
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Joined Jun 2011
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How many charges can i expect?

Hello. I have x4 2200mah 11.1v 40c lipos that i would like to charge off of my car battery at the field. I would like to know how many times i can safely charge these batteries off of the car battery?
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Old May 06, 2012, 12:10 PM
Southern Pride
everydayflyer's Avatar
Haralson County GA. USA
Joined Oct 2004
34,541 Posts
Honestly non. A car's starting battery is just rhat a starting not a deep cycle or hybride one. To charge one 3S 2200 takes aprox. 2Ah from you battery and that is about the same as required to start the engine twice. You can go ahead and do it any way but start saving for a replacement battery and purchase a pauir of junper cables and make sure you are not the last one to leave the flying site.



Charles
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Old May 06, 2012, 01:42 PM
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Ah okay thank you. I'm not going to risk that; i think it will be better to just spend more money and buy more batteries.
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Old May 09, 2012, 03:34 PM
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United States, TX, San Antonio
Joined Apr 2006
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knock on wood I have never been stranded from charging lipo's off my car battery but I limit how many batteries I charge. A healthy car battery should have problems charging five or so batteries without any issues depending on how large a capacity the car battery is.
I always put my car battery on a charger after a day at the field since the alternator will never properly peak charge a battery. Even after a 40 minute drive home from the field, it will take 3 hours to charge up my car battery at a 2 amp charge rate and my battery is only six months old.
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