Lomui 2800mAh Li-ion Battery for Samsung i9100 i9103 i9105 Galaxy S2 SII EB-F1A2GBU Tested under strict quality control standards. CE and ROHS certified. Grade A cells ensure longer battery life (500+ cycles) and high-speed, efficient charging. Built-in IC chip prevents overcharging. Guaranteed to fit your phone. Voltage: 3.7V. Capacity: 2800mAh No memory effect and environmental friendly .