iPhone 4/4S Charge Case Black
Take charge of your iPhone's battery life with this charge case—a spare rechargeable battery built into a slim sturdy cover. Juice up the case via the included USB cable and it will provide an emergency reserve of power capable of re-charging a dead phone battery to 80% capacity all without the use of bulky and awkward peripherals."
Fits Apple iPhone 4 and 4s. Includes USB charging cable compatible with any USB 2.0 port. 1900 mAh battery.