PowerCases Charging Bumper for iPhone 4/4S - Black

Ultra -slim, lightweight and durable, the Special Edition PowerCase Bumper in Black Gloss Aluminum provides your iPhone 4 and 4s with a stylish but robust protective shell featuring an open-faced design allowing instant access to the device. Simply charge your iPhone in the usual manner via the mini USB port, and the additional power provided by the PowerCase will keep you in charge for when you need it.