1 3.7V Lithium rechargeable battery 2 Capacity:1800mAh 3 CE,UL,SGS, ... >2000times 5 For light use NoItemSpecification 1Model3.7V Lithium rechargeable Battery 2Nominal Capacoity1800mAh 3Nominal Voltage3.7V 4Size18.0*65.2mm 5Charge Current0 ... light,laptops,power tools and other portable devices. 18650 3.7V Lithium Rechargeable Battery