Ok just a short add:
1. All drop in LiFePO4 batteries sold in the US have a BMS. The BMS will not allow over charging by design.
2. Check your specific battery specs but many LiFePO4 drop ins allow discharging well below freezing.
3. When temps are mentioned for charging or discharging we are talking about the physical cells within the battery case not ambient temps.
4. Again check your specific battery specs but just about every BMS on the market (minus gen1 Chins) has low temp cutout functionality.
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