How do I check the health of the battery on my device?

To check the health of your batteries on your device you can generate a Battery Report.  This can be done on devices with Windows 10 or Windows 11.

1. Right-click on the Start icon and select Windows PowerShell (Admin) if you are on Windows 10 or select Windows Terminal (Admin) if you are on Windows 11.
2. If you are asked for permission to make changes to your device, choose Yes.
3. Enter powercfg /batteryreport /output "C:\battery-report.html" and press Enter.
4. PowerShell will tell you that the Battery life report was saved.  You can now open File Explorer and access the C drive.  Here you can double-click on the battery-report.html file to view the report.

When viewing the report, while there is a lot of interesting information the main information you'll want to look for can be found under Installed batteries.  The FULL CHARGE CAPACITY value is the important value in determining the health of your battery.  To determine if you need new batteries multiply the value listed next to DESIGN CAPACITY by 0.85.  If this value is around or greater than the FULL CHARGE CAPACITY value, it's time for new batteries.  For example, 
 

DESIGN CAPACITY	95,040 mWh
FULL CHARGE CAPCITY	91,267 mWh

95040 x 0.85 = 80784

91267 > 80784 - I do not need new batteries