On my iPad Air 2 with iOS 9.0 and iOS 9.0.1 sucks. I have the same settings set as I did in iOS 8.4.x. With iOS 8.4.x I could go about a week with heavy usage, Kindle, weather apps, Facebook. Since I upgraded to iOS 9.0 and 9.0.1 I'm lucky to get 2 days with the same usage. I have background app refresh turned off on all apps. I close every app out except Kindle and I do have background app refresh shut off for the app.
My iPhone 6 and 6S seem to get the same battery life as they did in iOS 8.4.x. I just read about the WIFI Assist switch and I turned it off on both my iPhone 6S and my iPad Air 2. So I'll see if that helps.
My iPhone 6 and 6S seem to get the same battery life as they did in iOS 8.4.x. I just read about the WIFI Assist switch and I turned it off on both my iPhone 6S and my iPad Air 2. So I'll see if that helps.