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Our battery can be used well below 0C (can be normally discharged), but we don’t suggest charging the battery below 0C.
It is like most kinds of the battery in the market now:
Operating Temperature: Charge: 0°C--50°C; Discharge: -20°C--60°C.
Currently our battery can be charged at low temperature, but it is charged with a very small charging current. And we’ve used auto motive grade battery cells which have superior quality. Even if charging in low temperature environment, it will not damage the battery.
We will be launching the self-heating battery early next year.