Cybertech 2 x High Power 1800mAh Li-ion Batteries + Multi Function USB Charger for Samsung Galaxy SII Epic 4G Touch SPH-D710 (Sprint) Compatible with Samsung Galaxy SII SPH-D710 (Sprint) and SCH-R760. NOT compatible with AT&T (i777), T-Mobile (T989) S2. Chargers USB port allows you to charge with a USB connection (USB cable not included) Batteries have an integrated microchip that prevents overcharging to lengthen batterys life Includes 2 x 1800mAh Li-ion batteries + 1 x compact wall charger