Battery drains after 20 mins on full charge
My iPad Air First Generation is having issues with battery. After I fully charge the device to 100% the percentage will stay the same for about 15 minutes before going down to about 20% before shutting down on itself after 20 minutes total usage time. I have never downloaded anything or accessed anything that was suspicious and i only use app store apps. This has been going on for about 6 months and its very frustrating.
iPad Air Wi-Fi, Cellular, iOS 9.3.5