I have an iPad Air 2 that is currently in iOS 10.1.1. I have been using it for more than a year. I had this problem about the charging port because it doesn't charge using the lighting cable and wall charger that came with it. I also bought from power mac store a spare lighting and wall charger though the problem still persists. But it charges fine using the original apple lightning cable and a wall adapter from my samsung adaptive fast charger. I came up thinking that the power chip or something inside has been damaged. Since then, I have been using the samsung adapter and the original apple lighting cable. For now, I also had a chance to try different combinations of cables and adapters. -The original apple lightning and samsung adapter; -The original apple wall adapter and a non-apple certified mfi lighting cable. Also, whenever I boot the ipad in recovery/dfu mode, the computer doesn't recognize the ipad using the original lighting cable. So I cannot update or restore through iTunes because it stuck in the 'connect to itunes' logo. Whereas using the non apple certified mfi lightning cable recognize it and it continues to update or restore in itunes. But, syncing files, backup and restore backup in itunes either works. Which should I use in charging? Thank you!