Chichitec 2 2000mAh Battery and Free Wall Dock Charger with USB Output This is a High Quality Battery for the Samsung Galaxy S II i9100 series, Sprint Epic 4G Touch, Verizon Fascinate, AT&T Captivate i897, T-mobile Vibrant t959 Keep one as a spare and you're good to go that extra mile at work, checking emails, chatting with your friends or surfing the web on the road. Universal battery charger with USB output. Built-in intelligent chipset, never overcharge keeps the performance and life of batteries. Charging stops once battery is FULL. More convince to interchange your standby batteries with USB port. 2x2000mAh Battery + FREE Wall Dock Charger with USB port output Do not need to change back cover, increase battery life