Here is another interesting feature in Windows 7. Windows 7 comes with a built-in command "powercfg -ENERGY". This command creates a detailed report about your current power management plan. The format of this report is HTML.
The report helps in rectifying the issues which decrease the battery backup of your system and you can increase the backup time by fixing those issues.
To use this built-in command:
1. Click on "Start button -> All Programs -> Accessories". Right-click on "Command Prompt" and select "Run As Administrator". If you are prompted to enter password, enter the password and continue. You can also open Command Prompt in Administrator mode by typing "cmd" in Startmenu Search box and press "Ctrl+Shift+Enter".
2. Now provide following command:
powercfg -energy
3. That's it. It'll take 60 seconds and will create an HTML file which you can open in your web browser.

Thanks to our friend "Rob Margel" for sharing it...
This article was posted by VG in following section: Windows 7.
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Khunnanis
Thanks for you info.
Does it have battery time for longer life? My battery always blink at every second.
Shahnawaz
Does power management in Windows 7 makes efficient use of power on a Desktop PC especially the Processor.
VG
^^ Yup. Windows 7 power management is lot better than Vista.
@Khunnanis
It can help in increasing the battery backup time by showing various issues which decrease the backup time.