:/
Crap laptop battery I guess. Is it a 3 cell battery? Don't expect with these cheap batteries you'll get 3 or 4 hours run on these things. Truth is you'll be looking at about 1:30 or 2 hours at the most, any more and you are a lucky individual.
What is the laptop model and battery if you can find it? Was it a cheap machine? If so, do expect battery life to be poor.
Other than that, do as what rdc85 said, and also look for power management guides.
Download power management software, in my opinion Windows power management software is not at all good, but the Asus Power4Gear in my opinion is great! I get an extra hour or two on top of my 4/5/6 hour battery life ;D!
Don;t post your email address too.
Chao,
Dan