Elebase iPhone 6/6S/7/8 Battery Case (4.7"),4000mAh Portable External Backup Charging Case iPhone 6/6S/7/8,Rechargeable Impact Resistant Extended Power Bank Charger Case (Black) EXTEND BATTERY LIFE  --- The 4000mAh rechargeable battery case provides up to 120% extra battery capacity whenever you need it, giving you the power to do more. With a series of four LEDs on the rear side, you can easily keep tabs on battery power of the case. Never worry about power again! USER-FRIENDLY DESIGN  --- The product is easy to attach with a slide-and-lock design and you don't even need to remove the case to plug in your Lightning headphones or sync up your phone with a computer. Furthermore, you can also use this case with any magnetic mount as built-in magnets will hold your phone in place. ULTIMATE PROTECTION  --- By utilizing a more rugged design than other battery cases on the market, this battery case features a rigid plastic shell and raised bezel, to provide your iPhone with added protection against drops and hard falls. CHARGE WITH CONFIDENCE  --- Built-in fail-safe circuitry and temperature protection prevents over-charging and overheating. Besides, The first-class lithium-ion polymer cells also guarantee the most efficient charge for your device. WARRANTY  --- We back this iPhone battery case with one year warranty and friendly after-sale customer service. Please don't hesitated to reach out if there is any problem for your order :) Protective Battery Case for for Apple iPhone 6 / 6S / 7 / 8 (4.7 Inches) User Manual * 1 Capacity - 4000 mAh Material - Lithium-ion Polymer Input - 5V/1.5A Output- 5V/1.0A Case recharging time: About 3 hours Case Dimension: 5.66 x 2.76 x 0.65 Inches (L x W x H) Product Weight: 3.99 Oz Remove the top section of the case Slide your iPhone all the way into the bottom section of the case and make sure the cases connector is fully inserted into the phone. Replace the top section so that it snaps into the bottom section of the case. Once your phone is safely installed in the case, press the LED status button for about two seconds to charge it.