Just curiosity here, but since I downgraded from ios 8.3 because of the problem with ifunbox etc (read here: https://www.macrumors.com/2015/04/13/ios-8-3-ifunbox-itools-sandbox-app-access ) I've noticed an amazing increment in battery life.
Keep in mind I skipped 8.2 at first, I was on 8. something and I jumper on 8.3 directly, so I didn't have data to compare 8.2.
Anyway, it's so noticeble I've started taking screenshots of this (it's an iphone 5c 32gb): this are 3 different days, I'm not a super heavy user, but I never experienced something like this.
Keep in mind I skipped 8.2 at first, I was on 8. something and I jumper on 8.3 directly, so I didn't have data to compare 8.2.
Anyway, it's so noticeble I've started taking screenshots of this (it's an iphone 5c 32gb): this are 3 different days, I'm not a super heavy user, but I never experienced something like this.