My favorite thing about my pismo on campus earlier this year and last year was the battery life. I had one (and at one time two) practically new high-mAh batteries, which means 5 hours of runtime doing average things in OS X, and a good seven hours if I booted into OS 9 and entered super-conservative writing mode. (I kind of wish I had a CF card to replace the hdd with.)

When I had two batteries, it was about 10 hours of normal use under OS X, and I could get something like seventeen hours of super conservative writing mode.