Quick Answer: If you need to charge (not just use) your battery when temperatures drop below 0°C (32°F), you have options.
You can (1) Move batteries indoors, (2) Add external heating, or (3) Use batteries with intrinsic cold-charging capability. The question isn't whether you need heating—it's whether you need a battery that works naturally in the cold without wasting energy on thermal management.
The Critical Distinction
LiFePO4 batteries can discharge in cold weather down to -20°C with acceptable performance (70-80% capacity retention)[1]. The problem is charging below 0°C, which causes permanent damage through lithium plating[2].
Traditional solutions add heaters to force conventional batteries to work. Modern solutions engineer the battery chemistry itself to charge safely in extreme cold—no heating required.