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Windows 7 includes a hidden that will examine your laptop's energy use and make recommendations on how to improve it.
1. Type cmd in the search box, and when the cmd icon appears, right-click it and select "Run as administrator."
2. At the command line, type in the following:
powercfg -energy -output \battery\Energy_Report.html
3. For about a minute, Windows 7 will examine the behavior of your laptop. It will then analyze it and create a report in HTML format in the battery folder. Double-click the file, and you'll get a report which will suggest ways to improve your laptop's power performance.