Check Your Laptop Battery Health with One Command (Windows Battery Report)

After a laptop has been in use for a while, you start to wonder whether the battery drains faster than it used to. Windows includes a battery report that shows how much of the original capacity is left. You don't need to install anything; one command is enough.

Step 1: Create the battery report

• Right-click the Start button and open Terminal (or Command Prompt).
• Type powercfg /batteryreport and press Enter.
• Windows says the battery life report was saved and shows where. Usually it is C:\Users\YourName\battery-report.html.
• To save it straight to the desktop, set the location, for example powercfg /batteryreport /output "%USERPROFILE%\Desktop\battery.html".

Step 2: Only two numbers matter

• Open the file and the report appears in your web browser. Look at the Installed batteries section at the top.
• DESIGN CAPACITY is the capacity when the battery was new. FULL CHARGE CAPACITY is what it holds when fully charged today.
• FULL CHARGE ÷ DESIGN × 100 is your battery health. For example, 40,000 mWh out of 50,000 mWh is 80%.
• CYCLE COUNT is the number of full charge cycles. The higher it is, the more the battery has been used.

Step 3: Check the history further down

• Battery capacity history shows how the capacity has dropped week by week. A sudden drop may point to a battery problem.
• Battery life estimates compares how long the battery lasts now with how long it lasted when new.
• Recent usage shows when the laptop ran on battery and when it was charging over the last three days.

When should you replace the battery?

• Many people consider a replacement once health drops below 80%, because the running time becomes noticeably shorter.
• If the battery swells and lifts the keyboard or touchpad, stop using the laptop right away and contact a service center, whatever the numbers say.
• If your laptop is plugged in most of the time, a battery care option in the manufacturer's app (such as "charge only to 80%") helps the battery last longer.

Reference: Microsoft Learn – powercfg command-line options (/batteryreport)