Battery drain with low signal. Any fix?

[IIVisionII]

Hey guys, I was hoping someone might have a solution to this. I'm assuming my battery drain is due to signal quality, because when i'm at work, my phone will drain about 25% of the battery in about 30 minutes and gets very hot. It seems like the phone keeps turning on and is doing something, although all i have it check in the background is email and weather every half hour or so. This doesn't happen anywhere where i have good signal. I've resorted to putting my phone in airport mode when i'm at work, which is somewhat annoying. I've noticed the same thing happens when i'm in a low signal area. The screen keeps turning on a few seconds after i turn it off.

Is there anyone else having this problem and are there any fixes? i've tried using the Band switcher application and forcing 3g or 1x mode and it doesn't seem to help. I don't know what else to do really.

Thanks for any help.