Windows 7 includes new power options that will help to improve your notebook's battery life. To see them, click Start, type Power Options and click the Power Options link, then click Change Plan Settings for your current plan and select Change Advanced Settings. Expand Multimedia Settings, for instance, and you'll see a new "playing video" setting that can be set to optimise power savings rather than performance. Browse through the other settings and ensure they're set up to suit your needs.
Subject: Extend your battery life 
Sun Apr 04, 2010 12:22 pm