Check Laptop Battery Health in Windows

Generate Battery Health Report with Power Efficiency Diagnostic Report Tool in Windows

Windows includes a powerful command-line tool called PowerCFG that is very useful in troubleshooting Power Plans. Moreover this tool, Power Efficiency Diagnostic Report Tool, will also allow you to enable and disable devices. In this article, we will learn how to use PowerCGF to find out the health of your laptop battery. Starting with Windows 7, the OS includes a “hidden” tool that examines your laptop’s power usage and gives you a report and suggestions on how you can improve the battery efficiency. In this post we will see how you can generate a Battery Health Report with Power Efficiency Diagnostic Report Tool in Windows 10 / 8 / 7/xp/vista.

Power Efficiency Diagnostic Report Tool

1. Click Start button and type cmd in Search programs and files box
2. Right click on cmd.exe listed at the top of the Start menu and click Run as administrator
3. In the command prompt type cd %userprofile%/Desktop and press Enter
4. Next type powercfg -energy in the command prompt and press Enter
   
   powercfg will enable a trace for 60 seconds. If you want to use it for more information than just the battery details, make sure no other processes are running during that time

 

 When finished, powercfg will generate a report (in html format) which shows errors, warnings etc. Since we directed the command prompt to your desktop, the report will be placed on your desktop as energy-report.html. Just open the report in your web browser & scroll down to the Battery Information section. 

 

 

Above are two samples. On the left is a relatively new battery (a few months old). As you can see, the last full charge is only some 5.5% below the design capacity.

On the right is an old battery (around 4 years old) which shows that the last full charge was nearly 40% below the design capacity. From experience I know that this battery will only last a few months more. I've had a battery fail a few months after it tested 45% below its design capacity. I recently did a 'stress test' on this battery (which will show you the minimum time you can expect while running the laptop at 'full power'), and it only managed 36 minutes. Compare that with 125 minutes for the new battery.