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:2.5Ah Working voltage:2.0V~3.65V Max. pulse charge / discharge current: 5C (30S) Dimension: 65mm(L)*26(W)mm Weight: 0.076kg