Also using an iPad Pro that I got in 2018 (I think, the first 12.9 inch with the current look), it used to be better at it than it is now. In the beginning it w

Also using an iPad Pro that I got in 2018 (I think, the first 12.9 inch with the current look), it used to be better at it than it is now. In the beginning it would rarely drain now it drains ~20% overnight. Granted mine is older and has been heavily used. So the battery has had quite a few charging cycles by now. It's still fine to work on though. So have no need to replace it, but it is a little annoying to find it at much less of a charge than what I would expect.