laptop is listed in the sig. Made a big mistake getting a powerhouse p4 with widescreen in a laptop. The battery lasts me an hour if I'm lucky. The problem is I want to take my laptop to class but it doesnt last long enough to make it through. Is there anyway to get more life out of my battery by turning down settings I don't need in class? All I've done so far is turn down the brightness, it didnt help.