CTEK (56-926) LITHIUM US 12 Volt Fully Automatic Lithium Ion Phosphate Battery Charger Specially designed to recharge and maintain the cells of Lithium-Iron (LiFePO4) batteries Up to 4.3A of charge current available and will charge LiFePO4 batteries from 5Ah to 60Ah and maintain up to 120Ah Fully automatic 'connect and forget' charger with 8 charging steps including a testing sequence to show if the battery Numerous accessories simplifies using the same charger for multiple battery applications Water and dust resistant means it is safe to use in all climate situations