Incredibly Slim: only add 0.23 inch to your iPhone 6+ Plus/ 6S+ Plus. [Press on-off buttom 3 seconds to charge/stop 1 second to show the remaining power.]</br>Double Battery Life: Taking into account the conversion loss during the charging process 2800mAh high capacity can effectively provide 80%+ battery life for your iPhone 6 Plus / 6s Plus. (extra 18 hours 3G talktime 12 hours video 13 hours web browsing or 3.5 hours 3D gaming time.)</br>Easy Sync/Charge: Sync and charge your iPhone 6+ Plus/ 6S+ Plus directly through the battery case using your Lightning cable.</br>Intelligent Built-in Management Chips: anti-overchargeanti-overdischarge anti-heat intelligent power-off.</br>Reliable Quality - 12 months warranty refund/replacement would be available if you receive the defective products.</br></br>Product Description</br></br><b>- Discharging<Br/></b>Press on-off buttom 3 seconds to charge/stop 1 second to show the remaining power.<Br/><Br/><b>- Charging<Br/></b>Simultaneously charge your iPhone and battery case together mobile device will be charged first followed by the battery case.<Br/><Br/><b>- Lightning Sync<Br/></b>When sync data?? no need to remove the battery case. this case have data transmission function and the speed is the same with iphone own interface.<Br/><Br/><b>- Extend Battery Life<Br/></b>This case more than doubles your iPhone's battery life without doubling its size. The concern of cell phone is running out of juice will not be occurred when outside.<Br/><Br/><b>- Lightweigh & Portable<Br/></b>Attractive pocket-size design only weight 93g (3.28 oz)?? also is a protective backup case that prevent your phone from impact and scratc