I'm getting 3-1/2 to 4 hours when the indicator in the menu bar turns red denoting about 15% left. So maybe 4 to 4-1/2 hours if I pushed things until automatic sleep. Just general use: Safari mainly with no flash, MS Office. Sounds are off. Display is dimmed about 4 notches below max OSX Lion w/SSD. 91% health w/69 cycles. Apple's battery FAQ implies I don't need to calibrate with my model MBP. (Although I have before with no different results). So... given these light usage habits, I'm thinking at least 6 hours would be a reasonable expectation - a full hour less than what Apple touts. I'm wondering though (and this is the main reason I'm starting another battery thread), does keeping an idle copy of Win7 running under Parallels eat up some of this? Even if it's just sitting there on another desktop and not being used?