Citra 3500mAh Rechargeable External Battery Case Power Bank for iPhone 6 - 4.7in (White) Ergonomic, form fitting, fully protective ultra-resistant case and battery Built in short circuit and over charge protection Integrated power switch allows you to switch on/off the battery case Compatible with all versions of iOS 8 and older Track case battery power status at a glance with an integrated 4-light LED status indicator