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Windows 7 Power Efficiency Report

Cedric from NJ asks:

What’s a good way to check and improve the performance of my laptop? I feel like the battery drains way too fast and it’s practically brand new!

A very useful but unknown feature of Windows 7 is the built in tool to examine a laptop’s energy utilization and provide recommendation on how to improve and maximize battery life. This can be used by anyone with administrator access on a Windows 7 machine. Windows 7 will run a few tests to evaluate the performance of your laptop. The test results will be analyzed and a suitable HTML report will be generated. This report will provide recommendations on how to improve performance.

Maximize Laptop Battery Life

In order to use it, navigate to the command prompt by going to Windows -> Search Box -> Type “cmd” in the search box and when the Command Prompt appears in the search results, right-click it and select “Run as Administrator”.

Type the command given below to obtain an energy report

powercfg -energy -output \FilePath\Energy_Report.html

where FilePath represents the location where you want the HTML Report to be generated.


This test will analyze the system for common energy-efficiency and battery life problems and generate a HTML Report.  This command should be used when the computer is idle and when no other programs/processes are running. Various optional parameters which can be used with this command are:

– OUTPUT : To provide the path of the output file
– XML : To provide an XML Report
– TRACE : To record trace files of system behavior in current path
– D : Used to specify trace file path name. Can only be used in conjunction with the TRACE command.
– DURATION : Specifies the number of seconds for which the system behavior is observed, default is 60 seconds.

Using this feature within Windows 7 will reduce the amount of additional diagnostic software which needs to be loaded on the laptop and thereby reduce the overheads / bloatware which is present in most branded laptops today. This will also provide a minor boost in performance.

Utilize this hidden feature in Windows 7 and maximize your laptop’s battery life today!

~Deepak Kannan