Like most everyone else, my battery life with the stock battery was great when I first switched over to kitkat 4.4.2. Then it slowly got worse and worse to the point of almost being dead after 9-10 hours of light use from a full charge. I saw that the app Unified Daemon(EUR) was using a lot of data and using my GPS a lot throughout the day. So since my phone is rooted, I used Titanium Backup to freeze it. Rebooted the phone to see what other apps were going to crash because of it. Turned out nothing crashed. Everything still works. So I kept it frozen for a couple days and now my battery life improved big time. After 9 hours I'm at 58%. Unified Daemon(EUR) is used for news and stock widget updates. Since I don't use any of those, I guess that's why I didn't see any changes after freezing it... except more battery.