I think by resolution he means brightness, the biggest battery drainer, which can be adjusted in settings or with various apps (I use Lux, which has a slight learning curve, but worked wonders for my battery). Never heard of standby being something you can adjust?
The biggest problem I had with my S3, and possibly the main problem overall, was battery life. It SHOULD be amazing. But some phones don't seem to process that power as well. Unfortunately only a replacement phone seemed to truly fix it. Turning off 2/3 GPS helped, but I knew that was only a short term solution. But now I get amazing battery life again.
Also recommend reading through this...Battery life??
I recommended this on another thread. There's an app called watchdog lite which tracks what's using your phones cpu/ram/batt. Theres others but this one is simple.
Try it and see if maybe it's an app misbehaving or process....