Is your iPhone absolutely critical to your life? Does being in the red make you worried? The Energizer Charging Case for iPhone gives you thepower to connect, anywhere, anytime. Its pre-charged and ready to use!The Charging Case extends your iPhone battery life up to almost a full charge. This sleek, black case fits snug around the entire phone as one piece. You control the charging with a simple On/Off switch. A Micro USB cable is included so you can sync, and charge your phone and recharge the case at the same time.