ZANYA Battery Case for iPhone 7, 3000mAH Rechargeable Case Protective Charging Battery Case Portable Charger Extended Battery for iPhone 7/8 Black (4.7 inch) Extend 125% Battery Life : Built - in 3000mAh rechargeable lithium polymerbattery, which could provide extra 125% battery for your iPhone, no worry about low-battery, enjoy your iPhone anywhere and anytime. Data Synchronization & Charging : Support syncing data through computer without removing battery case. When you use cable to charge iPhone and case simultaneously, it will preferentially charged your iPhone except the phone is full of power. 360 Protection : Due to the raised side can provide all - around protection for your cellphone, avoid colliding, dropping and other daily wear. Listening & Enjoy : Coming with Apple lightning jack, just listening to music or watching movies, Enjoy the fun of your iPhone. Worry-freeService : We promise to provide 1 year warranty, 30 days worry-free 100% money-back e service.