This 12V deep cycle lithium battery is the perfect replacement from a group 31 AGM, GEL or lead-acid Battery. It’s the perfect combination of size and capacity to fit many applications including, RV, marine, solar energy systems and more. All MaxLi Battery use the safest and most stable components, including a LiFePO4 cathode and a built-in Battery Management System (BMS). The BMS ensures a long lifetime, safe handling – and high-accuracy State of Charge (SOC) calculations.