Understanding the result
When supported, the percentage is the charge level and the status indicates whether the browser reports active charging.
Other useful tools
Battery Test
See whether your browser exposes battery information. Many modern browsers restrict or remove this API, so an unavailable result is normal and does not mean your battery is faulty.
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Battery information unavailable
Checking browser support…
Battery health and cycle count cannot be read by this page.
Battery health, capacity and cycle count are not available to normal web pages.
How to use this tool
- Open the test to request supported battery information.
- Check charge percentage and charging status if provided.
- Use your system battery settings for the most reliable details.
Troubleshooting
- If no result appears, use the operating system battery panel; many browsers intentionally disable this API.
- Reconnect power and reload if the charging state appears stale.
Browser and device limitations
The web Battery Status API is unavailable in many browsers and does not expose health, capacity, temperature or cycle count.
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Common questions
Why does this say unavailable?
Your browser or device may not expose the Battery Status API for privacy reasons.
Can a website measure battery health?
No. The browser API does not provide reliable battery health or cycle count.
Does unavailable mean my battery has failed?
No. It normally means the browser chooses not to share battery information with websites.