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It’s quite annoying when you have work to do on your laptop and the battery is dead or low on power. Even if you’ve selected the Power Saver plan, there could be other factors causing the battery to drain too quickly. Today we take a look at using the PowerCfg command to generate a power efficiency report.

To generate the report you’ll need to use the Elevated Command Prompt as Administrator. Click on Start and type CMD into the search box, then right-click the command prompt icon and select Run as Administrator.

Next type in the following command to generate the report on energy efficiency:

powercfg -energy

It takes a full 60 seconds for the report to generate. and you’ll see the following message in the command screen when it’s finished. Notice it shows the number of errors and warnings contained in the report. The Power Efficiency Diagnostics Report is saved in HTML format in your local user drive. Now you can read through the analysis and try to determine what is causing so much power to drain. In this example in the errors section it’s showing Sleep Mode is disabled and a USB device is not turning off when not in use.

[via The How-To Geek Forum]