Gene Lee of TheHDPilot.com had a problem: His iPad wouldn’t charge in the cockpit.
“While investigating how to fix it, I realized a lot of other people have the same problem too,” he says. He wrote a short article explaining how he fixed the problem. You can read it here.
The following video by Julian Ilett will explain why apple products will not charge on some USB outlets. Yes, it is 18 min long, however it it is well worth your time if you use any apple products.
https://www.youtube.com/watch?v=IVNA4gvQzKo