In the past, people who went camping or 4wding in very cold weather knew to avoid charging their deep-cycle batteries if possible, and if they really needed to charge them, to do so at a much lower rate than normal.  All that has now changed with the introduction of our Cold Climate Lithium Batteries. These batteries contain a BMS-controlled heating film which will gently heat the cells when the battery detects the ambient temperature has dropped below 0°C, ensuring that the cells remain in the optimum charge temperature range. This means you can charge them as normal at ambient temperatures as low as -20°C. The process is fully automatic, meaning you don’t have to think about turning on and off the cell heating and can focus on having a good time instead!