Under power save mode, with everything except wireless turned off I get 2 hours if I'm lucky. Under full performance mode, less than an hour.
mines a samsung r40 get about 2.5hrs enough time for a movie before it dies! cinema feel isnt it great -cool
Samsung... Varies from 1hr to 2.5hrs depending on use (when I am desperate, I turn the brightness of the monitor so low that nobody can read anything off there )
Mac Powerbook G4 bout 2.5 under moderate surf and chat. less if playing games obviously and more if i dim the light.