This Power Case is a multi-functional power bank full back cover bumper case with built-in 1500mAh high capacity rechargeable lithium battery. It can charge your 4.5-inch iPhone 6 6s at anytime anywhere, It is suitable for the stand by power supplies to travel, tourism, long distance business in car and ships, field work or power outage environments. It is luxury, elegant, small, portable. Note : When you plugged data cable in the case ,it will charge the case first , if you want to switch charge the phone , just press the button , it will change charge the phone , when the phone battery 100% full , it will Intelligent change charge the case again ! They charging stopped after one day and it doesn't charge the phone at the same time as the case when it's plugged in. Features: Fine texture, Smooth surface Super slim and light design High capacity keep your phone alive. To extend the time for about one-fold LED indicator Plug and Play Cell type polymer lithium battery Input DC5V-0.8A Output DC5V-1.0A Max Charging time 5/7 hours Nominal Capacity: 1500mAh Protection: Short circuit/Over charge-