Yesterday I was able to finally take my iPad Pro with MK out. I took the dog to be groomed. While waiting for the dog, I stopped at a nearby Dunkin and had breakfast and used the iPad during the time answering/composing emails, Facebook, you tube, Used Agenda and Excel a little. When the call came that the dog was ready, I had been using the iPad with the keyboard for slightly over 3 hours. Battery indicator was at 71% which I thought was pretty good. I have not experienced the battery drain while the iPad was off with the MK attached, unless I have received a lot of notifications and then it is only a percentage point or two. I am using a 2018 IPP (11").