Incase Neoprene Pro Sleeve for 13" MacBook Pro - Tropic Blue - CL60312 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 MetroPCS LG Spirit 4G.