What do you have syncing and how often??? Dump the task killer, manually set the brightness......When looking at your UPTIME and AWAKE time, are the times close???
What shows as being the largest percentage user of the battery??? (It will be listed under the battery option under ABOUT PHONE.
How long does your battery last? In a weak cell signal area, and with GPS locator turned on, I can burn through 50% in just 2-4 hours.
I have GPS on 24/7. (2 of the three options. I do not have the VZW option checked) I average 4-5 hours of use with 19 hours of awake time. This is with the stock battery.
A weak signal can knock a battery down quicker. But it has to be very weak.