No, it's not. Before panicking, try this quick fix that takes care of most upgrade problems. Do a complete cold restart. Here is the best procedure. First, quit all background apps. . . then do a cold start by holding down the home button and the off/on button simultaneously for ten second until the iPhone is forced into shut down. Then press the on button for a normal start-up, if the hot condition contnues, make an appointment with the Genius Bar at the nearest Apple Store.
IMHO, battery life on my iPhone 5 is noticeably worse than it was on IOS7. Looks like something they will fix in 8.0.1.
I’m sitting here, watching the battery monitor drop by 1 percent every 5 minutes as I use it.
Battery life issues seem to be endemic to .0 releases.
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