Baidatong 4500mAh External Battery Charger Case for iPhone 6 / 6S - Gold The powerful 4500 mAh built-in smart lion-thium polymer battery can provide more than a full charge for your iPhone Plus Holster with a sleep function charging time: 4H With 4 LED power indicators: 25% 50% 75% 100% The Atomic Battery Case also has the following functions built-in: charging switch, LED battery level indicator, charge & sync through the case, headphone jack cutout, function button Works with iOS8 and all future updates; One year limited warranty by BAIDATONG to ensure our products work the way you need them to.