Do consider that if it's never been used, the battery may be so dead that you have to replace it. I have had to do this with a new one I bought, and it seems to be a common issue for new old stock.
The only thing doing tech tests has taught me is that I'm too stupid to do the job I've been doing professionally for the better part of 2 decades.
The War Thunder forum has once again been used to share restricted plane documentation - this time about the F-117 Nighthawk
Well, as I said, the smart connector on the ipad. It is used to connect the keyboard if I'm not mistaken.
Do consider that if it's never been used, the battery may be so dead that you have to replace it. I have had to do this with a new one I bought, and it seems to be a common issue for new old stock.