CE Compass 2X Battery + USB Dock Wall Battery Charger For Samsung Galaxy SIII S3 I9300 Easy to charge your battery without the phone Compatibility : Samsung Galaxy SIII S3 I9300 Best replacement for the original battery with comparable standby and talk time Keep an extra battery on hand for extend standby and talk times Integrated microchip prevents overcharging and lengthens battery life The best replacement spare battery for your phone The battery operation time depends on conditions such as: Transmitting power level, Signal (distance between the phone and the base station), Network parameters defined by the operator