iOS 10.1.1 update is causing iPhone battery issues

Apple's latest iOS update, 10.1.1 promises, among other things, "stability improvements and bug fixes." But some believe it's also carrying a new battery bug.
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According to a report by PCMag.com the update is unexpectedly draining iPhone batteries. There's also an active discussion on Apple's own support site where customers are reporting iPhone 6 and iPhone 5S devices unable to last a full day without charging. Others report iPhones dying