The XPAL PowerSkin Galaxy S III Battery Case doubles your battery life and protects your phone at the same time. The XPAL PowerSkin Galaxy S III Battery Case has a built-in rechargeable secondary 1500mAh battery that attaches to your GSIII, instantly doubling the battery size on your phone with very little added heft or size. The silicone construction of the case is soft to the touch, but improves your grip on the phone and protects it from bumps and scrapes. This case includes LED battery status lights and includes its own charging cable.