LiFePO4 batteries are highly safe, have no risk of explosion and fire, and are environmentally friendly, non-toxic and non-polluting. No memory effect - the battery can be charged in any state of discharge, giving you peace of mind. Nominal Voltage:3.2V Nominal capacity:55Ah Working voltage:2.5V~3.65V AC impedance resistance(1khz):≤0.25mΩ Max. pulse charge / discharge current: 55A Dimension: 160(H)*24(T)*140(W)mm Weight: 1.15±0.05kg