EasyAcc® - make it easy Why choose an EasyAcc® iPhone 6 (4.7") battery case? 2-in-1 Charging and Protection With 3500 mAh of power and superb energy conversion efficiency, the high-capacity built-in battery can provide 150% more power to an iPhone 6. This case is not just an external battery, either; it is also an iPhone 6 case with a style that"s reminiscent of Iron Man. The case protects against dust and scratches while the corners are made of soft rubber that protects against shock and drops, offering your iPhone 6 complete 360 degree protection. 360° Protection The separable locking mechanism allows the battery case to be easily installed and uninstalled without damaging your iPhone.The sides of the battery case, meanwhile, are slightly higher than the screen of your iPhone, which means that if your iPhone is dropped, the sides will make contact with the ground first, protecting your screen. Precise Openings and a Stately, Metallic Back The metallic section on the back lends the battery case a stately air, while the precise openings ensure that all controls and features can be accessed, including the camera, which can be used without obstructions while retaining a natural viewing angle. Notes: Most headphone plugs will be too short to reach the headphone jack when the battery case is being used. Therefore, we recommend using the audio jack extender that comes with this battery case when using headphones. Hold the power button for 3 seconds to begin charging. The power indicator will come on and go off again in about seconds, and your phone will display its charging status on its screen. While using the battery case to charge your iPhone, press the power button for up to 2 seconds to see how much power the battery case has left.