iPhone 6S Battery Case,Eran 7000mAh Power Bank Case Cover For iPhone 6 Rechargeable Protective External Battery Charger Case For iPhone 6s (4.7inch) (Black iPhone 6 6s) Innovative 3 in 1 functions including power bank, USB charging cable, back cover case. 7000mAh large battery capacity as a great backup power pack. Fast recharging speed for possible emergance use Steady charging and discharging current guarantees your phone from common charging damage. Portable, convenient, easy to use, high capacity. Stand function for your visual needs. 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 .