Hyperion Samsung Infuse 2 x Battery + Charger (Compatible with Samsung Infuse i997) Extend your talk time on your Samsung Infuse 4G. 2 x 1800mAh Battery and 1 x Universal Wall Dock Charger. Do not need to change back cover. Easily swap your battery when your charge is low. The batteries have an integrated microchip to prevent overcharging and lengthens battery life. Quick charge with automatic constant current control prevents battery from overcharging, short circuit, and electronic shock.