I have a Samsung GS5 on 4.4.4 and rooted. I don't run many apps currently as I'm trying to figure out my battery life issues. When I got the phone I could go all day and be at 60-70% after work. After root I regularly see 30%on my trip home. I have tried disabling everything and still have around the same battery life. I use wake luck detector and froze apps that chronically kept things awake but that made little difference. The primary user seems to consistently be the os (kernel=20-25%, android system=10-20%) for a total of ~50%.