Rechargeable battery case for I Phone 4&4s. Rechargeable battery case for I Phone 4 & 4s. Place your Iphone 4 or 4s into the case in the way that charging port of the backup battery case goes into the charging port of your Iphone 4 or 4s.
Works both as an extension of battery for the iPhone itself and a protective case. 4 LED charge status indicator shows the capacity of battery. Customfit for the contour of iPhone 4G/4S precisely. Used for charging your iPhone 4G/4S anytime and anywhere.