A:AnswerIt should need about 10 hours to charge and then after that rarely needs to be charged again as long as you close the case after each time you're finished using it.
A:AnswerThe Ultimate Pro has backlit keys and the iPad detaches from the keyboard. The Ultimate is not backlit and it is connected to the keyboard, but can fold down so the keys aren't showing; especially helpful when you want to use the iPad as an iPad and not as a mini-laptop.
A:AnswerThe iPad Air 2 is slightly thinner and lighter than the iPad Air. So, if you have an iPad Air it probably won't fit in the case. If your iPad has a touch ID fingerprint sensor then you have an iPad Air 2.
A:AnswerI know the iPad will fit into the case. My conflict with a different case was the alignment of the sound buttons. They are exposed in this case so that may not be a concern.