The smart battery case for iphone 7 gives you extra battery life with the look and protection of an apple-designed case. Combined with the smart battery case, iphone 7 provides up to 22 hours of battery life for browsing the web, up to 24 hours of watching hd video, and 26 hours of talk time.* the smart battery case also works intelligently with your iphone to charge simultaneously when you’re plugged in, so both case and iphone will have more than enough battery life to get you through the day, and then some. The soft elastomer hinge and one-piece design make it easy to put the case on and take it off. You can even connect it to any lightning accessory, such as the lightning dock. And ios 10 allows you to see the battery status of your iphone 7, your smart battery case, and even your apple watch, all in one place. *testing conducted by apple in august 2016 using preproduction iphone 7 units and software paired with preproduction iphone 7 smart battery case units and preproduction software. Video tests consisted of repeated playback of a 2-hour, 23-minute movie purchased from the itunes store. Internet tests were conducted over 3g, lte, and wi-fi networks using a dedicated web server, browsing snapshot versions of 20 popular web pages, and receiving mail once an hour. Talk-time tests were conducted by placing a cellular phone call. All settings were default except: bluetooth was paired with headphones; wi-fi was associated with a network for all but the internet 3g and internet lte tests; the wi-fi feature ask to join networks and auto-brightness were turned off. All battery claims depend on network configuration and many other factors; actual results will vary.