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Top: Here's what Energy Saver looks like in its expanded condition on a laptop. (On a desktop machine, it's far simpler.) If you turn on the "Put the display to sleep" option, you can specify an independent sleep time for the screen. Bottom: Here's the relevant slice of the Schedule tabthe door to the Mac's selfscheduling abilities. Finally, "Put the hard disk(s) to sleep when possible" saves even more juiceand noiseby stopping your drives from spinning when not in use. The downside is a longer pause when you return to work and wake the thing up, because it takes a few seconds for your hard drive to "spin up" again. 13.13.2. Laptop Options As noted above, Energy Saver on a laptop offers quite a few additional controls (see Figure 13-10). That's because power management is ten times more important on a laptop, where every drop of battery power counts. The pop-up menus at the top of the dialog box, for example, let you create different settings for the two states of life for a laptop: when it's plugged in (Power Adapter) and when it's running on battery power (Battery).
