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All of the LiFEPO4 batteries need to be kept above 0C/32F, while charging. [0]

Mine doesn't have an internal heater, so I make sure to keep it disconnected from the solar panels when it is cold out.

I live in a warm weather area so it was worth the cost difference for me at the time. Worst case, I can just get a simple 12v heating pad for it.

[0] https://www.relionbattery.com/knowledge/how-do-lifepo4-batte...

>>latchk+(OP)
Thanks! I had a (much) smaller LiFePO4 cache battery in my dynamo bike light stored in an outdoor shed that significantly killed its capacity, so I was wondering what people did to manage these types of batteries in outdoor conditions.

>>xattt+0h1
Storing it should be fine. It is charging it that is the issue.