iOS 8 battery life. It's most awaited answer after iOS 8 download links. If you have iPhone 5S - iPhone 4S or iPad 2 - ipad Air with new iOS 8, you can see new features in yours devices. But sometimes iOS 8 users have problems with battery life.
It is no different for me, but what the iPhone 5S battery usage page has illuminated for me is that iOS 8 Calendar is eating up my battery in the background - to the tune of being responsible for 49% of my battery usage since I upgraded. I think it's not normal for iOS 8 battery life.
Last night I moved all my Calendars to iCloud leaving me with iCloud and Exchange as the only two calendars on the iPhone 5S. Once I complete 24 hours set up like this I'm going to remove the Exchange calendar and run anther 24 hours to see if that's the problem. :)
After iOS 8 download + restire, the battery life is quite ok. I get 8 hours of usage and 1 day of standby with 14% left on my battery indicator. Biggest drainer would be facebook and messenger.