[bogart99]

As you say it depends what you are doing, but getting around 2 hours sounds ok to me. I can possibly squeeze a bit more out of mine with a 5300mAH battery, but this plummets if you start doing a lot of disk accessing, watching a DVD etc ie anything that causes the fan to run.
Have heard that having the WiFi enabled when not using it uses quite a bit of power, plus you can also drop the power if you dont need a long range to connect.