Since I updated my iPhone 5 to iOS 8, I've been getting ridiculously short battery life. For example, I took it off charge this morning and it was full, I've probably used it for about 30 minutes in total as I've been at school, but when I got home it was on 55 percent. This is almost half the battery drained from being locked in my pocket for about 6 hours.
Pressing the lock button 6 times seemed to be a fix in iOS 7 but doesn't work now. When I was having similar problems a while ago, someone on here sent me a link to the ultimate guide to saving iOS battery life, or something like that. I'm still following the steps in that and even they're not making much difference any more.