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-   -   Lipo battery ??? (https://www.rc-monster.com/forum/showthread.php?t=20949)

Jason 05.19.2009 12:21 AM

Lipo battery ???
 
I charged my lipo battery the same way I always do but sometime I feel I get good power/punch and another time charged the same way too I feel got some lost power/punch it is me or lipo dont always perfoms the same ? does the heat of the lipo before to use it can affect the perfomances or ?

mkrusedc 05.19.2009 12:28 AM

Have you balanced it recently?

Jason 05.19.2009 12:29 AM

I always balance them on each charge.

E-Revonut 05.19.2009 12:30 AM

I have found that after a minute or two is when I get the best performance. They seem to need to get a little heat into them to perform best, cold lipos don't perform very well.

blueb8llz 05.19.2009 12:33 AM

i noticed this before and asked the exact same question on here.
the weather has to do with it. i found it the colder it is outside, the lipos had less punch.

himalaya 05.19.2009 03:26 AM

That might be the reason why "LiPo warmer" exsists.

suicideneil 05.19.2009 11:48 AM

Or 'coat pocket' :lol: I wouldnt pay for a lipo warmer when human body heat is free and works just as well. But yeah, warming the lipos to around 90-100*F will yield best results.

BrianG 05.19.2009 12:26 PM

Quote:

Originally Posted by suicideneil (Post 288311)
...I wouldnt pay for a lipo warmer when human body heat is free and works just as well...

Not exactly free. Heat is energy whether you get that energy from an electric warmer or need to consume X number of calories to generate the body heat. :wink:

lincpimp 05.19.2009 12:33 PM

Quote:

Originally Posted by suicideneil (Post 288311)
Or 'coat pocket' :lol: I wouldnt pay for a lipo warmer when human body heat is free and works just as well. But yeah, warming the lipos to around 90-100*F will yield best results.

I can just see Neil roaming around on a cold winter's day with lipos taped to the inside of his thighs trying to keep them warm...

I too noticed that cold lipos do not perform very well.

NoControl 05.19.2009 07:11 PM

Yea heat is a factor on any lithium battery, the heat it produces and the heat around effec the chemical reaction producing more power. If I remember correctly if a data logger with a voltage sensor on it was to be hooked up to the battery and logg the info you'd actually see, say a 3s 11.1v peek at 12.5 or 12.652v just from the extra chemical reaction from the heat....Sorry for hte partial lecture its a habbit.

Jason 05.20.2009 04:36 PM

after 20minutes of hard off-road bashing grass and all my lipo was just at 82F


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