A number of users of the Mophie Juice Pack Air have reported problems with the battery case not being recognized or properly charging iPhone 5 devices following iOS updates. While the specific reasons are unclear, there have been reports since iOS 7.0 and iOS 7.1 of iPhones suddenly showing a message that the accessory may not be supported, usually following an iOS update; similar issues have been reported following the recent release of iOS 8.1.…