For iPhone 6 6s [Battery Case] ZUSLAB Charger Charging for Apple [Apple MFI Certified] External Protective [Extended Backup Battery Pack Cover] Power USB Juice Bank Battery 3100mAh (Gold) The powerful 3100mAh Li-polymer rechargeable battery can effectively provide 100%+ extra battery life to your iPhone 6 / 6s Apple MFi Certification is approved by Apple to work with all functions of your iPhone 6/6S charging case. 100% full compatible support with iOS 8+ and future iOS software updates. Includes 1 extra colored bumper frame. Raised front bumper stands higher than your iPhone screen to avoid contact with other surfaces. Featuring sync-through technology, you never need to remove the battery case to sync or charge your phone. The ZARUS iPhone 6/6S battery case also has built-in: LED battery level indicator, charge & sync through the case, and conveniently placed cutouts for all buttons and ports.