I'am having this problem and I've seen a few other post suggesting the same problem, so I thought I'd be wise to make a separate thread for this. The problem is that sometimes my iPad Air gets stuck in a boot-crash loop. It will first boot, then show the lock screen, unlock, crash and reboot. This is pretty problematic and take hours before it stops, but what makes it even worse is that during this process, the device uses more battery than it can charge, meaning that the battery (slowly) drains, even if it is connected to the charger. It becomes even more problematic once the battery is empty. Now it shows the low battery sign, until it thinks that it has enough battery to boot and boots, but the boot takes to much time and battery and it cuts of even before the boot is complete. The only way out of this is to put it in DFU-mode and restore it. Now I know this is a beta 1 and that these are very buggy. I have frequently used betas since iOS 6 and I know the drawbacks from that, I remember that the first beta of iOS 8 would crash its apps all the time and respring, but nothing nearly as bad as this. This is a very serieus problem and makes the device completely unusable.