Apple Pencil drastically affects iPad Pro Battery Life, even when idle and fully charged.
I ran a little pseudo-scientific experiment on my new iPad Pro 11 inch after being disappointed with its battery life. Yes i used it a lot and 5-6 hour screen on time still sounded good enough but my impression of iPads has always been that they should easily be able to last 2 days of fair use. More importantly, I noticed that my battery percentage would drop fairly significantly overnight for an Apple product. My iPad would be at 100% at 12 am and be at 97 or 96% at 10am. Yes this is marginal, but it doesn’t make sense considering I didn’t touch it at all during that period and the folio case meant the screen shouldn’t be turning on either.
I then tried to start using the iPad without the Apple Pencil always attached and saw immediate improvements. Overnight in the same time period I would lose absolutely no charge, and overall battery drop wasn’t as rapid.
This doesn’t make much sense to me as if my pencil is attached it is being charged up to 100%. At that point it needs no further charge thus the iPad shouldn’t be using resources to charge a pencil that is already charged. I assume, however, that it is the same as most electronics and the pencil allows itself to slightly discharge, and then recharge continually as to not overcharge. This process perhaps causes the iPad energy drain even in idle.
Your experience may vary, though I don’t think it will. Regardless, it’s worth a check. The issue is annoying bc now I don’t want to keep my pencil always attached but don’t have a convenient place to store it.