If you have a Windows 7 laptop and you want to extend its battery life, Windows 7 includes a hidden built-in tool that will analyze your laptop’s energy usage and give recommendations as to how to improve power consumption and extend your laptop’s battery life.
Here’s how to do it. 1. Run a command prompt as an administrator. To do this, type cmd in the Start Menu search box, and when the cmd icon appears, right-click it and choose “Run as administrator.”
2. At the command line, type in the following:
**You can change the output directory to anything you want – as long as the directory already exists**
3. Windows 7 will take a few moments to examine laptop’s power usage. After if finishes analyzing, it will generate a report in HTML format (Web page) in the folder you selected. Just double-click the file, and the report will open in your browser.
You can follow the recommendations in the report to improve your laptop’s power performance.