High Quality 2000 mAh External Battery Pack Portable Power Bank Case Charger For Samsung Galaxy S2-AT&T Verizon Fit for Samsung Galaxy S2 i9100 Capacity: 2000mAh; Charging time: about 3 hour Input Voltage: 5V, Input Current: 400-500mAh; Output Voltage: 5V, Output Current: 750mAh User Manual and USB cable included