iPhone 6S Plus Battery Case, Rhidon 8000 mAh Power Bank Case Rechargeable Protective Battery Charging Case for Apple iPhone 6 Plus (5.5 inch) (Rose Gold) LARGE CAPACITY: 8000 mAh Li-polymer rechargeable battery,can be full charged 2.7 times for iphone 6/6S Plus . It is used A class polymer battery, you can do safe charge at anytime and anywhere. FAST CHARGE: Full end five protection technology,reduce voltage conversion, which is safe and can reduce phone fever while charing. SMART CHARGE: Charge and discharge at same time . Press the button to charge for phone first, and after full charge, it will be smarted changed to charge for backup battery. it will be automatic power down after power saturation . Other phone can be charged via external USB port. PRACTICAL DESIGN: Its shell used Piano paint process or scrub treatment,high-end and very nice hand feeling. The holder function is a very special sweet design, it allows us watch film and charge at same time ! PERFECTLY COMPATIBLE: Works with iOS8/iOS9 and all future updates ;When charging the power case ,put your phone into the case , press the switch key to sync data with iTunes .