Otterbox Xbox Power Swap Controller Batteries
The closest thing to a permanently powered wireless controller.
There isn’t much you could improve on the modern Xbox controllers, but it would be nice if the batteries could last forever. While this isn’t exactly that, the Otterbox Xbox Power Swap Controller Batteries are functionally about as similar as you’re going to get. By having two batteries for your controller you never have to suffer sitting a meter from your television to rejuice your controller again. Simply swap one for the other in the charging dock and you can play remotely for up to 10 hours before swapping over again.