Eleta 2400mah Rechargeable Battery Case for iPhone 6/6s - Black Form fitting, fully protective ultra-resistant case and battery Tested to be compatible with iPhone 6 IOS Operation System and following updates. Will not left you stranded running out of power with accessories not supported warning message from Apple IOS system Featuring sync-through technology that you can sync your iPhone to a computer without having to take the battery case off. Simultaneously charge your iPhone and battery case together with the included micoUSB cable. Built in short circuit and over charge protection Check power status at a glance with an integrated 4-light LED status indicator