Hyperion Samsung 2 x Battery + Charger Compatible with Samsung Galaxy Prevail M820, Intercept M910, Transform M920 SPH-M920, Galaxy Indulge R910, Replenish M580, Galaxy Gio S5660, Craft SCH-R900, Sidekick 4G (1500 mAh) 2 x 1500mAh Battery and 1 x Universal Wall Dock Charger. Do not need to change back cover. The Smart LED shows charging status. Quick charge with automatic constant current control prevents battery from overcharging, short circuit, and electronic shock. Easily swap your battery when your charge is low.