The only weird thing about it was that you couldn't charge a fully empty N810 with the micro(?) usb charger. It'd charge just enough to boot and then crash again, because it couldn't wake up far enough to negotiate a higher current with the charger.

Had to use a barrel plug to charge it.

Spent a very nervous and sweaty day figuring that out when I bought one used with no warranty or returns and it didn't boot properly =)