Replaces or upgrades your faulty or damaged Samsung i9100 Galaxy S2. Works like the original manufacturer cell phone battery with 1650mAh Li-ion battery of capacity but at a lower cost. Stay connected with your family and friends by getting extra battery power today. This replacement battery has an integrated microchip that prevents overcharging and lengthens battery life. - Color: Black - Voltage: 3.7V - Capacity: 1650mAh - Double cells - Built-in decoding chip - Compatible with Samsung i9100 Galaxy s2 - Great replacement for your damaged worn or lost original battery