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read if your in cold weather and use lithium


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When everyone is hunkering down and trying to stay warm its time to think about your lithium batteries.

The good news is that you can discharge or use your battery no matter how cold it gets, without worrying about damage. You will notice that your lithium battery is dying much quicker than it had in warmer months. When temperatures reach this low, below freezing, it temporarily reduces the capacity.

Coming in from the cold your hands can hurt while they warm up. The same thing goes for lithium batteries. When your batteries internal temperature drops below 32 degrees, the lithium cells are unable to accept the same amount of charging current (warmth) as they did when the temperature was warm. Don’t charge your lithium batteries when the battery temperature is below freezing.

There is an exception; You can use a 1-amp charger on any lithium battery that is 12-amp hours or larger. This low current is like warming your hands slowly when getting in from the cold. The current is not high enough to damage your battery but allows you to add charge to your battery when you are not able move your battery into a warmer area.

The sun helps too. Are you hooked up to solar power? The good news is even when stored in an unheated location the solar panels will keep your battery active to the point where the internal battery temperature will not drop below freezing.

Remember: Don’t charge your lithium batteries when temperatures are below freezing unless you are using 1-amp charger, or they are connected to your solar system.

(taken from a different place not my writing just doing research)

 

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Truth. Lithiums aren't for folks who see frequent subzero. You can check spec sheets, you rarely see one that's rated for any level of charge current below 0

Your best bet is to insulate them. Install a heating blanket if applicable. Keep those puppies from freezing

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