3 x Gold 2450mAh High Capacity Battery + Charger for Samsung Galaxy S2 II I9100 Tested under strict quality control standards. CE and ROHS certified. Built-in IC chip prevents overcharging. Guaranteed to fit your phone. Grade A cells ensure longer battery life (500+ cycles) and high-speed, efficient charging Voltage: 3.7V. Capacity: 2450mAh. Package contents: 3 - High Capacity S2 i9100 Batteries. + 1- Wall Dock Battery Charger with USB Port