Samsung Original Genuine OEM 1850 mAh Battery for Samsung Galaxy S II - Non-Retail Packaging - Silver It is recommended to fully drain and fully charge the battery especially during the first 3 charging and discharging cycles, doing so may greatly improve the overall life of the battery OEM Part Numbers: EB-L1D7IBA / EB-L1D7IBAB / EB-L1D7IBABSTD / EBL1D7IBA Battery Capacity: 1850mAh, Voltage: 3.7V Original OEM product Battery is not compatible too Samsung Galaxy S II - SPH-D710