Hyperion LG Lucid 4G 2 x Battery + Charger 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 Smart LED shows charging status. Quick charge with automatic constant current control prevents battery from overcharging, short circuit, and electronic shock. The battery has an integrated microchip to prevent overcharging and lengthens battery life. Compatible with LG Lucid 4G (VS840)