Hello! My iBook 600mhz, 12 in display, is 9 months old. I'm running Jaguar 10.2.2. I use the strictest energy conservation savings, and display is always dimmed to near dark...I only get about 2hours and 20-40 minutes worth of life when "fully charged." Couple of caveats though: I use the airport card and I installed a 512 mb dimm in the iBook. I figure this is why the battery life has been limited... Any thoughts? Still, it's one the BEST Mac I've ever used..=))