Give your Apple iPhone 4 or 4S protection and power with the Apple iPhone 4 / 4S Extended Battery Case. The hard shell case will prevent dust, dirt and scratches from accumulating on your phone, keeping it looking good as new. The built-in battery provides additional power to your iPhone 4 or 4S, helping you stay connected while you’re on the go. LED battery status lights on the back of the case let you know when your battery is in need of a charge. Unlike most extended battery cases, the Apple iPhone 4 / 4S Extended Battery Case will charge your iPhone while the case itself is charging. A simple touch of a button allows you to control when your case provides power to your phone.