This thread is purely about battery life, not other performance questions on 8.4.1 vs. 9.3.x on the Air 2. I ran several of the iOS 9.0 betas and got battery life that was noticeably shorter than 8.4.1, so went back to 8.4.1 before 9.0 was released. I'm wondering if 9.3.1 has fixed that on the iPad Air 2? I have two iPhone 6 phones, one that's on 8.4.1 and the other 9.3.1 and I don't see any difference in battery life. That makes me think that I probably won't see a battery life hit if I upgrade the Air 2, but I'd like to hear from Air 2 owners. If you have upgraded from 8.4.1 to 9.3.x, have you noticed any difference in battery life?