Windows Battery Report Analyzer
Drop in battery-report.html and read wear, health score, cycles and capacity history — all locally.
How to generate the report on Windows
- Open Terminal or Command Prompt as administrator.
- Run: powercfg /batteryreport and press Enter.
- Open the shown folder (usually C:\Windows\System32 or your user folder) and find battery-report.html.
- Come back here and drop that file in the box above.
powercfg /batteryreport
No report loaded yet. Add your battery-report.html or try the sample.
Advanced options
Light browsing uses 8–15 W. Video editing can pass 30 W.
Read your battery health in one minute
- Start with the instant check above: no file needed, it reads the live level in the browser.
- Generate battery-report.html with powercfg /batteryreport on your Windows laptop.
- Drop the file in the box above — parsing happens locally, nothing is sent anywhere.
- Read the health score: design versus full-charge capacity, wear percent and cycles when available.
- Open the capacity history chart to see whether wear is gradual or sudden.
- Set your typical load in watts to estimate real runtime for your use.
- Use the verdicts as orientation: sudden drops, shutdowns under load or swelling mean service, not settings.
Battery report questions
Where is battery-report.html saved?
Run powercfg /batteryreport and Windows prints the exact path, usually inside C:\Windows\System32 or your user folder. Copy that file path into Explorer to find it.
What is a good wear percentage?
Up to 10 percent is normal after months of use. Above 25 percent you will feel shorter runtime, and above 40 percent most users plan a replacement.
Why is there no cycle count?
Some batteries and drivers do not report cycles. The score then uses wear only, which is still the most reliable signal.
Is my file uploaded anywhere?
No. The file is read with the browser FileReader API and parsed in memory on your device. Closing the tab discards everything.