Welcome to the forums, Mrbez!
You'll start to learn where your battery life takes a big hit and it's most definitely that (humongous, gorgeous) screen.
Trying to set it as low in brightness as bearable really helps. Also, disabling a lot of Samsung built in settings like eye tracking and what not can help.
If you can kill the entire battery and post a screenshot of your usage, we can give you a bunch more help!
In one of those threads there was a theory that the 4.2 update required some sort of processing, or something. That the problem would eventually disappear. I noticed last night that Google Services was not my top use, or even one of the top five uses, so there apparently is something to that theory because I have not received any new updates.
To the OP, just leave the screen brightness on automatic. And give the battery time. I've never found that batteries last long on brand new devices.
BTW, I should add that yesterday I drove to a park for a family event. I think after arriving there I was at about 95% battery, because I had the phone plugged in on the way there. I used the phone for a couple two three calls while at the park, and looking at some emails. Then I drove home, using Navigation with the screen on and music playing (through a 3.5 plug). I'd forgotten to plug the power in though. Even with the screen on most of that 30 minute trip, and using the phone for my normal uses the rest of the day, I still had over 70% power when I went to bed.
So the battery does take time to break in? I had the first s4 for not even 48 hours and I had to charge it 4-5 times through the day. I charged it to 99%, drove for about 2 hrs, one text convo going, listening to music, and screen on auto, and when i got home it was about 60-70% battery life left. kind of wierd huh?
The all-new Samsung Galaxy S4 is all but guaranteed to be the next top-selling device. The new device is dubbed the "Life Companion" due to its intuitive features. The Galaxy S4 sports a 5-inch 1080p Super AMOLED display, an awesome 13 MP... Read More