After updating yesterday to iOS 10.2.1, my iPad Air 2 no longer charges its battery. Plugging it into any charger, including its original wall wart, I get the pop up saying "This accessory no longer supported" and it doesn't charge. I've restarted it. I used compressed air to blow out the Lightning port. Has anyone else seen this? It's an original Air 2, about four years old. Is it likely just dead, or can I get it repaired by Apple for a reasonable cost?