Lithium-ion 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:3.7V Nominal capacity:26Ah Working voltage:2.0V~3.9V AC impedance resistance(1khz):≤3mΩ Max. pulse charge / discharge current: 560A (30S) Dimension: 161(L)*227(W)*7.5(T)mm Weight: 0.55kg(No accessories)