Automatic charging of Lithium (12V LiFePO4) batteries The LITHIUM XS is specially designed for Lithium (12V LiFePO4) batteries. With up to 5A of charge current available, it can charge LiFePO4 batteries from 5Ah to 60Ah and maintain up to 120Ah. It’s easy to use – just connect it and charging starts immediately. There’s no need to disconnect your battery and any low voltage protection electronics will be reset automatically. The LITHIUM XS is a ‘connect and forget’ charger with 8 charging steps, a testing sequence that tells you if the battery can take and retain the charge, a unique maximisation step to restore full capacity and patented maintenance charging for maximum performance, even after months of inactivity.