Battery life cut down and fluctuates after reinstalling windows vista


I recently had my laptop rebooted to factory settings. Now that I have it the battery life shows to last only 30 minutes tops (which actually does before the red light comes up and the laptop dies) from about an hour and a half that it used to last. It is a gateway W350A. Is there something I can do?

***Note that, it will only last 30 minutes already in Power Saving mode

Thank you for your time.
Have you been in to "advanced" power settings ?
There are scores of other options you can customize.
Your battery could also just simply be on its way out. Battery life does decrease over time. Try fully discharging it and than giving it a full charge.