Ok so I've had my iPhone 6s since December but ive been noticing that the percentage is acting crazy not like what people are complaining saying it freezes on the battery percentage but mine skips a percentage level like I'll be on 44% and next think you know it's on 42% I didn't even see the 43% and it's been doing that on 9.2 and now also on 9.2.1 that I updated.