Privacy first: This tool runs in your browser. It does not upload device readings to OceanofTools.
Battery Status Checker tool
Press “Check Battery” to read the Battery Status API.
How the Battery Status Checker works
The tool requests the browser’s Battery Status API and displays only the values the browser makes available. Some browsers deliberately disable this API to reduce fingerprinting risk, so an unsupported message is normal and does not indicate a device problem.
- Battery level and charging status update live.
- Time estimates come from the operating system and may be unavailable.
- No reading is sent to our server.
Frequently Asked Questions
Why does the tool say the Battery API is unavailable?
Many browsers restrict battery data for privacy. The result depends on the browser, operating system and device.
Is the remaining battery time exact?
No. It is an operating-system estimate and may change as your workload, brightness and network use change.
Does this tool measure battery health or cycle count?
No. Web browsers do not normally expose battery health, capacity or cycle-count data.