YAll know what, rooted or not PR of CLEAN GB or another rom no matter what kernel I have some days my battery lasts all day sometimes it lasts half a day and sometimes I need to charge it three to five times a day depends on the day, weather, what I do, or what mood the phone is in
Usually I have auto sync off at work I leave data off unless I need to use it for something, wifi is off at work cause theres no wife I can connect to at the schools.
Sound is sound only no vibrate, brightness is at auto and auto rotation is off, I use the drop down in Peoples rom to access all the stuff and that alone helps my battery a lot, PLUS I cal my battery once a week.
Oh and I usually try to keep the lock screen off too
theres other tweaks I use, but I actually have to look inside to see them LOL
Samsung Galaxy SIII
Rooted, running TPR