Skque&reg; Replacement 1650mAh Li-ion Battery for Samsung Galaxy S2 I9100 Keep a spare battery so you don't miss an important call when you run low on battery life.Easy to install and perfectly fit for Samsung Galaxy S2 I9100 Best replacement for the original battery.Capacity: 1650 mAh;Voltage: 3.7V;Note: Please ensure you give the replacement battery a good 12 hour charge before full usage for best performance. Package Includes:1 x Replacement 1650mAh Li-ion Battery for Samsung Galaxy S2 I9100