A Better Battery
Tiger improves battery life with an intelligent power management technology that manages your system automatically. For example, Tiger can slightly dim the display automatically when running on battery power, and it doesnt require the hard disk to spin up as often to flush the disks cache. If you want to tune the settings manually, you can use one of the two alternative power profiles or you can create your own.
And you don't have to fear sleep. Mobile Macs wake from sleep in a second, almost as fast as it takes to lift the PowerBook or iBook screen.