LiTime 12V 200Ah LiFePO4 Lithium Battery Review Off Grid Solar Battery Review 1.2Ã Run time, 1.5Ã Power Output? Battery Size 18.9 x 11.61 x 8.46 inches. With 40Ah more capacity and 150A strong BMS, Ampere Time 12.8V 240Ah LiFePO4 battery supports powering more appliances and lasting longer when compare with other brand 12.8V 200Ah battery with 100A BMS.