Mobile network signal under battery

[whatda]

Anyone know what the colors mean? the line is mostly light and dark yellow, with a few red and green patches.

What I noticed is, once the battery hits 25%, it starts draining draining the battery a lot faster. Although I get about 12-13 hours with only 1-1.5 hours of screen time.

 

[dj hidroid]

You should be able to pull at least 3 hours of screen time unless you are doing a lot of video streaming. My Gs3 is in a fringe area at home so a lot of the battery gets eaten up looking for a cell signal but even then I've been able to get 3.5 hours of screen time and that was with a defective battery. Samsung has had my phone for the past week due to a few separate issues and I'm jonesing to get it back. It should be here by Wed. at the latest and it couldn't come sooner.