Laptop update...

I'm not so sure about the battery life of this thing and as I posted on Notebook Forums:

I got my laptop a week ago and was wondering why it seemed to be running down too fast, especially since it has the 9-cell battery and a constant praise item has been the long battery life.

Last night, while watching DVDs, chatting and surfing with the thing set to Max Battery and the screen dimmed to half-brightness, it drained to 3% and went into hibernation after about 3-1/2 hours. I had an optical mouse and a Kensington Flight Lite 2.0 plugged in at half-brightness, but that's not going to eat up 1-1/2 of the supposed run time, is it? (I also have Omega drivers and set Powerplay to Balanced while on battery.)

Do I have a duff battery or unit or what?

Others and reviews spoke as if this thing would last 5+ hours. Drat.