EC TECHNOLOGY&reg; High Quality 1 x 1900mAh Li-ion Batteries For Samsung Galaxy S II S2 GT-I9100, Galaxy S2 II I9100 Only For I9100, NOT Compatible With AT&T Galaxy S2 II(SGH-I727), NOT Compatible With T-moblie Galaxy S2 II(SGH-T989), NOT Compatible With Sprint Galaxy S2 II D710(Galaxy S II Epic Touch 4G) Type: Li - ion battery; Voltage: 3.7V. Capacity: 1900mAh, more than 500 charge cycles Compatible with Samsung Galaxy S II S2 GT-I9100 / i9100 / Galaxy S2 II 9100G Package:1xbattery