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Old Oct 12, 2012, 03:31 PM
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HoosierGuy's Avatar
United States, IN
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Is it Safe to Charge Lipos with 2C?

After I fly and I know I wont be flying for a few days I try to put all my lipos in storage mode. I keep reading you can extend the life of batteries if you put them in storage mode if you aren't going to use them for a few days or longer.

That's all fine and dandy but... There are times when I want to go flying and my batteries are in storage mode and it would take a little too long to charge them using 1C on my charger. My question is: Is it safe to charge most 3 cell (and 2 cell) batteries beyond 1C and up to 2C?

The battery I use the most is a 3 cell 2200mah lipo. I usually charge that at 2.2 amps. Would it be OK to charge it at 4.4? I also have a little 3 cell 800mah battery that I want to charge at 2C. Would it shorted the life if I did charge it at 2C?

Most of my batteries have come from Value Hobby. I know many batteries say they can be charged at a higher rate, but is it really safe?

Thanks
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Old Oct 12, 2012, 07:40 PM
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xmech2k's Avatar
United States, CA, San Diego
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I wouldn't try unless it's printed on the battery that it can do it.
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Old Oct 12, 2012, 07:46 PM
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Generally depends on the cells IR. So if you are using 20c+ packs generally you are safe doing that. The lower the IR the faster you can go.

It likely does decrease their life a bit, maybe.

That said - I like 1c charging in parallel, doing more than one pack at a time.

Mike
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Old Oct 12, 2012, 08:17 PM
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What I did instead was get a charger that charges 4 batteries at once. That way I can head to the field with 4 charged batteries in the time it takes to charge 1.
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Old Oct 12, 2012, 08:25 PM
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All you need is a parallel charging board. Then any charger can charge multiple packs at once.
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Old Oct 12, 2012, 11:04 PM
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Quote:
Originally Posted by pda4you View Post
All you need is a parallel charging board. Then any charger can charge multiple packs at once.
you got that right...best $$ i've spent lately
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Old Oct 13, 2012, 12:02 PM
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Could you charge multiple batteries from one output from the charger? In other words, say, 2 or 3 batteries off a parallel line from a single output at 1c? I ask because I have a 2 and 3 way parallel plug to run multiple batteries in my plane...
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Old Oct 13, 2012, 12:15 PM
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Could you charge multiple batteries from one output from the charger? In other words, say, 2 or 3 batteries off a parallel line from a single output at 1c? I ask because I have a 2 and 3 way parallel plug to run multiple batteries in my plane...

Absolutely. As long as all the packs have the same voltage (capacity does not matter) and are discharged to near the same level.

Works great!

Mike
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Old Oct 13, 2012, 12:38 PM
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They are. I run them in parallel in my plane, and their voltage(s) are nearly identical. Sweet! Cut my chargin' time in half!
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