Extended Replace 4200mAh Battery + Cover For Motorola Moto Droid Bionic 4G XT875 INPUT: AC100~240V - 50/60Hz 0.15A, OUTPUT: DC 4.2V~350mA~ +_50mA; USB 5.2Vd.c. 800mA Compatible with: Motorola Moto Droid Bionic 4G XT875 (Not fit for AT&T, T-mobile) Cell type: Lithium Ion, Voltage: 3.7V This replacement battery could prevents overcharging and lengthens battery life Best replacement for the original battery with comparable standby and talk time