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The Complete Idiot's Guide to Microsoft Windows 8 by Paul McFedries

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Better Battery Life Through Power Management

When using batteries to run your portable PC on an airplane or some other no-power-outlet-in-sight location, it’s natural to worry. That’s because the battery can last only so long, so you have a limited amount of time to work or play before your electronic world goes dark. Windows 8 can help relieve some of that worry thanks to its power management features. For example, one of these features enables the system to shut down idle components (such as the hard disk and monitor) to prevent them from gobbling up battery power unnecessarily. Another feature lets you monitor how much power is left in the battery. This section takes you on a tour of these and other Windows 8 power-management landmarks.

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