iContact Ultra Slim Protective Case with Built-in 1500 mAh Rechargeable Battery Designed for iPhone 4/4S - Retail Packaging - Includes Black and Silver Interchangeable Bumpers
A Lot More Power In a Lot Less Space! Sometimes it's just not practical to stop everything and look for a wall socket to recharge your iPhone. Now you don't have to. With the iContact case for iPhone 4/4S, you can switch to the auxiliary battery that's built right into the case and keep using your phone without interruption. In fact, the built-in rechargeable battery will double the time you can use your iPhone before you have to stop to plug in again. And the ultra slim design won't add a lot of bulk to your iPhone, just a lot more juice. It's easy to insert and remove your phone and the switch out the side panels ("bumpers")... black and silver bumpers included! The case charges with a computer USB port or a USB Wall Adapter (not included). It's so simple and useful you won't remember how you ever lived without this case!