When a lithium battery freezes, its capacity and voltage decrease due to slowed chemical reactions, which impacts power delivery. If a fully charged battery freezes, internal expansion can occur, potentially causing damage. WattCycle 12V LiFePO4 batteries are designed to handle extreme temperatures, operating effectively in conditions as low as -4℉ (-20℃) and as high as 158℉ (70℃). These batteries are equipped with internal resistance heating capabilities, allowing them to regulate their temperature and maintain optimal performance across various climate environments.