Capacity drops by 15–20% at -20°C (-4°F), with some models losing half their power output in extreme cold. Cold weather reduces lithium-ion transfer rates in LiFePO4 batteries by up to 30% compared to optimal conditions. . Cold temperatures slow down the chemical reactions that take place inside batteries, hampering their performance and reducing their discharge capacity. This means that the maximum amount of energy that the battery gives off will drop in lower temperatures. LiFePO4 batteries have significantly more capacity and voltage retention in the cold when compared to lead-acid batteries. Performance at High Temperatures Increased Conductivity:. . Capacity: High Temperatures (Above 45°C or 113°F) Increased Self-Discharge: At higher temperatures, LiFePO4 batteries tend to lose charge more quickly, even when not in use.
