I see that you’re in airplane mode. I tried that for a couple of days and really can’t tell if it made any difference in battery life. I’m doing too many different things on my SGP to be able to test it. I just turn off whatever I can, including active apps, to help conserve battery. Those things that aren’t needed but that still run in the background are like little energy vampires. lol In the beginning I thought the max battery hours were huge, but with playing music, videos, games, surfing the net, and downloading stuff, the battery gets used up really fast.
I think the airplane mode helps…it turns off stuff like bluetooth, etc. than can suck a little battery. You can still enable wifi in airplane mode, as well. With airplane engaged, and wifi only occasionally engaged, the battery seems to last a long time for me. As you may have noticed, it takes a long time to charge that huge battery too! I’ve only used mine at home so far, so I have the brightness down at about 1/3. When I watched the movie the other day, I kept it plugged in…I have a six-foot USB extension cable so I was able to keep it plugged into the AC power.