Product Name : PANASONIC Lithium-ion Rechargeable Battery Model : PANASONIC CGR18650AF . Norminal Capacity : 2050mAh . Nominal Voltage : 3.6 V . Diameter : Max 18.6+0/-0.7mm . Height : Max 65.20/-1.0mm . Weight(Typical) : 42 g . After a fresh battery has been charged at constant voltage/constant current (4.2 V, 1365mA (max), 1 OOmA cut-off, 25'C), the average of the capacity (ending voltage of 3 V at 25'C) that is discharged at a standard current (39OmA).