I am having the same problem with iPhone 5. I had battery drain problems with iOS 7 when they did an update and ios 8 made it worse. Tried everything possible turning stuff off but this iOS 8 I am now charging phone at least 3 times a day. I have literally tried everything and battery is like a timer just clicking down. One would thin since apple admited a problem with battery drain issues this would have fixed it but it made it worse. Great job Apple. I know it is not my battery because the updates of iOS changed it instantly to drain and iOS 8 made it worse.
This is unbelievable they know they have a battery drain problem and put out an update that makes it worse. Forgot this. My iPhone 5 uae to **** down at around 47% or so and I had to plug it in. Now ios 8 it did it at around 71% to me the other day. Just typing this with the brightness turned off and down I just lost over 20% battery life.
LIke I said I tried a restor, a complete wipe of the phone and backed it up and restored it, background app refresh off, locations services off, notifications off, and whAt else is there to do???? i am glad I got portable batteries to charge me back up.
Apple please get this fixed and stop creating problems you know you have and stop making them worse. Maybe they should let users test the new iOS updates along with developers because I feel developers are just testimg their application to see if it works. Let the users report big because obviously develpers are not.
Get it together apple. Now as I end this I lost 30% and going to get a battery pack.