How this test works
View battery status in browsers that still expose the Battery API. The test uses standard browser capabilities and does not require installing an application.
When to use it
- Before buying a used or refurbished laptop.
- When troubleshooting a device after a repair or update.
- Before selling or handing a device to someone else.
Important limitations
A website cannot fully diagnose every hardware component. Treat the result as a practical screening check. For faults that matter financially or affect safety, use operating-system diagnostics or a qualified repair technician.
Frequently asked questions
Why does it say unsupported?
The Battery Status API has limited browser availability. Unsupported does not indicate a bad battery.
Can a website measure battery health or cycle count?
Not reliably through normal web APIs. Use the operating system or manufacturer diagnostics for those values.
Related device tests
Run the complete used-laptop checkup or continue with the device information test.