The best battery life i have seen quoted is 5 hours! But normally average battery life varies on age and make model of the laptop. Normally it is around 2/3 hours for an average battery life.
Serunson
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My laptop gets a little under 2 hours of battery, which is the Dell C600. However, I've used a notebook that get's about 6 hours of battery life, and one that got 8 hours of battery life. If your want to increase your battery life, you probably want to add additional batteries. Also, I use Ubuntu, so I get a little less battery life.
darrglud
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My HP only gets an hour.
I think you'll find a battery rating at the HP site.
hughv
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