Energy Efficiency Report in Windows 7 can point out whether how is your Laptop’s battery. Apart from it, powercfg can check other parameters as well.
powercfg command for Energy Efficiency Report tool has many variables and can generate Energy Efficiency Report either in xml format or html format. In order to be able to use the powercfg command, the user need run the cmd with Administrative rights.
Which can be done by clicking the Start button, typing “cmd” in the Start menu search field, right clicking over it, selecting the Run as Administrator option, accepting the security prompt and then the cmd console is ready to do the steps needed for generating the Energy Efficiency Report in Windows 7, which we are going to write about. In one screen shot :
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Energy Efficiency Report Generation in Windows 7
To generate energy efficiency report, type in cmd :
powercfg -energy -output <span style="color: #ff0000;">C:test.html</span>
The red text is where your Energy Efficiency Report will be generated. You can use difficult to type locations in Energy Efficiency Report command like %USERNAME%/Desktop/ and can give it any name like happy_is_unhappy.html
Now, go to that location and open the html file in any browser.
Advanced usage of Energy Efficiency Report Generation (powercfg) command
Commands for advanced usage of Energy Efficiency tool can be launched as help by using powercfg/? command followed by hitting Enter key. For example, the default Traceout time in Energy Efficiency Report is 60 seconds, you increase it as per your wish.
How to copy the commands of Energy Efficiency Report options from cmd to Notepad?
As the commands of Energy Efficiency Report tool is difficult to remember, you might wish to copy all the advanced commands of Energy Efficiency Report tool.

Simply type powercfg/? command and hit Enter key. You will get all the commands for Energy Efficiency Report tool. Right click on the cmd window and either click Select All > Press CTRL + C to copy all and then CTRL + V to paste to Notepad or, you can selectively copy the commands for Energy Efficiency Report tool by Right click > Click Mark > Hold the Left button of Mouse and highlight the specific parts of Energy Efficiency Report Tool’s Commands.
