In the video below iOS 11.0.1 and iOS 11.0.2 are tested using Geekbench 3’s battery benchmark test. The tests are running on the iPhone 5S, the iPhone 6, the iPhone 6S and the iPhone 7.
So it looks like there are no major battery life improvements with the release of Apple’s iOS 11.0.2. The next major update that we are expecting for iOS is the new iOS 11.1, this is currently in beta testing, we still don’t know when it will be available for download. Check out the test below.