As a follow up to my last post here, I received my new iPad Pro and have used it about a week now. So far, the battery seems to be holding fine. Perhaps the problem is hardware related and I got a good battery? If it's a software problem, it might be that I have something set to prevent excess drain, though I'm only guessing. I have location services turned off on most apps and many of those that do use it are set to use it only when active. I've also not set up a data plan. I've only got the cellular version to use the GPS for apps that download map information for offline use. Siri is mostly disabled and feedback to Apple is turned off too. Good luck.