Start liking this
PwrVault is a fully integrated; form fitted rapid-charging case. With easy insert and snap design, on/off button to control usage, the PwrVault doubles battery life offering additional hours of internet, video, GPS and music. At 0.72 inches thin, PwrVault is ergonomic, shock-resistant and simple to use. The four blue LED power indicators display battery status.
Global Marketing Partners iPhone 4 Case (PV1001B)