Fix for Battery Drain Issues on iOS 7 Update

I just got the latest iOS 7 upgrade on my iPhone. Ever since this upgrade, I can't use my iPhone for longer hours now. With iOS 7, my battery was always drained. I tried searching for some fix and to my surprise, some users actually says, the iOS 7 upgrade improved their battery life. How come it is the opposite of what I encountered? Is there a fix for this or should I push to go back to the old iOS 6.1?
