TEST GUIDE
Review the hardware and browser information a phone safely exposes, then use the manual guidance for battery health and condition details browsers cannot access.
A reported charge level describes the charge available now, not remaining capacity compared with a new battery. Check the phone's own battery settings for health information when available and note any service warning. A browser cannot verify battery authenticity.
Browsers expose different device information. A missing battery, memory or network value can mean the API is unavailable or restricted. Treat approximate values as browser-reported information, not verified hardware specifications.
Checking a used phone? Follow the Android inspection guide or iPhone inspection guide for checks this browser test cannot cover.
COMMON QUESTIONS
No. The test runs in a supported browser, although some device features require permission and may not be exposed by every browser.
No. It is a screening tool for browser-accessible behavior. Combine it with physical inspection, device settings and the ownership checks before buying.
No account is required. Results are kept locally in this browser unless you choose to print or save a report yourself.