X5 mobile&reg; 1500mAh High Quality Li-ion Batteries For Samsung Galaxy S T-Mobile T959 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. Battery Voltage: 3.7V. Capacity: 1500mAh. 5.55Wh Package contents: 1 cell phone battery