NS-LB02 SIZE AA Chemical System: Zn/KOH/MnO2 Nominal Voltage: 1.5 Volts Mercury Content: Less than 0.0001% Nominal Dimensions: ?14.5(mm) x 50.5(mm) Max Weight: 23g Nominal Capacity: 2500 mAh Jacket: Aluminum Foil Shelf Life: 36 Months