There have been posts about the keyboard not charging fully. My experience is that it gets a full charge to 100% after the tablet is charged. There was one report that you can charge the keyboard using a usb connection. I am not seeing that. I did discover however that if my Lumia 920 indicatior is correct, it will charge off either the keyboard or the tablet using a usb connection. This is a real plus for backup charging of the phone. The tablet also immediately recognized my phone and pulled up a windows phone web page to allow files transfers to the tablet from the phone.