My solution to battery drain.
First do your tests while you are sleeping. Charge battery to full and take off charge as you go to bed ie. let phone go off charge at 12am that way you know at 8am or 10 am when you wake up exactly how many hours it's been going for.
My phone is probably at around 95% on standby after 8 hours.
Here's how I got it there.
settings\wifi\advanced keep wifi on during sleep change to only when on charge, (actually I noticed this was set to always and I've gotten 36 hours out of my phone so far with 40% remaining.
Turn email checking to 1 hour instead of 15 mins.
settings\applications manager \running. stop all processes you don't use and disable them. after that go to all and get rid of the remaining services.
What I disabled after a fresh factory reset.
chaton, dropbox, google play books, google play movies, google+, lumines dots, music hub, s memo, s planner, s planner widget, samusng backup provider, samsung browser sync adapter,
samsung calendar sync, samsung cloud data relay, samsung contact sync, samsung push service, samsung smemo sync, samsung syncadapters, talk, video hub, windy weather, yahoo finance and yahoo news.
I am never gonna use this so why run it?
seriously guys I am now getting the battery life I reckon the phone should get. I use my phone in moderation only using it every now and then to check texts and perhaps take a photo and a quick 2 min phone call here and there.