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Old Mar 15, 2012, 12:48 PM
Registered User
Canada, ON, Mississauga
Joined Apr 2006
465 Posts
Discussion
battery get freezed?

I have 3 battery packs - 6s lipo.
They works perfect last summer, but running badly when it turns to winter.
The battery are all fully charged and tested, they just couln't get my trex 500 hover for at least 10 seconds before showing low voltage.

When I test the volt, it is still ok, not terribly low. is this all because of temperature?
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Old Mar 15, 2012, 12:53 PM
Kamikaze Ace
Glacier Girl's Avatar
USA, FL, Lakeland
Joined Jan 2010
2,387 Posts
Temp yes to a point. Packs have to warm up a bit before they will work fully.

But voltage is not a good thing to be checking unless it's under load.
A nearly kaput pack with no capacity left can still show normal voltage, when checked with no load on it.

Hook up a watt meter inline, and run up your heli and see what's happening to the voltage under load.
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Old Mar 15, 2012, 01:14 PM
Southern Pride
everydayflyer's Avatar
Haralson County GA. USA
Joined Oct 2004
34,839 Posts
If the LiPoy itself is below 50F it should not be charged more than 4.1V per cell.

Cold LiPolys perform very poorly under much of a load. Best to warm them to 70F or more before charging or flying. They perform much better when at 100 to 125F but best not to go past 125F or their cycle life will be reduced.
Charles
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Old Mar 15, 2012, 03:32 PM
24 yrs. of Aircraft flying
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United States, GA, Rockmart
Joined Oct 2004
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Edited as I did not post here
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Last edited by epoweredrc; Mar 15, 2012 at 10:01 PM.
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Old Mar 15, 2012, 10:08 PM
Go Ducks
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United States, OR, Milwaukie
Joined Feb 2012
136 Posts
Edited - I was responding to the post that was not posted above.
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