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#41
On my work laptop, a Dell E6400 with a Core 2 Duo CPU, 4GB of RAM and an Nvidia Quadro NVS 160M....I noticed that when I turned off the aero transparencies and such that my battery life increased with the 9 cell battery by about 45 minutes on Vista. So, I got about 6 hours with aero transparencies on and about 7 hours or so with it off. So, considering it doesn't really benefit me in work related tasks and such, I just keep it turned off.
I also keep the backlit keyboard off too.