Battery Status API Viewer

The Battery Status API, also known as the Battery API, allows web browsers to access information about the system's battery charge level, charging state, and estimated time to fully charge or discharge. It helps web apps adapt their behavior based on power availability.

The Battery Status API is supported in Google Chrome, Microsoft Edge, Opera, and Samsung Internet. Unfortunately, Firefox and Safari have removed or never implemented this feature due to privacy concerns.

Yes. The API does not require any user permission, and the information it provides is very limited — only charge level, charging status, and estimated times. However, some browsers restrict or hide this API in insecure contexts (non-HTTPS) or for privacy reasons. This tool runs entirely in your browser; no data is sent anywhere.

The times are estimates reported by your operating system. They can fluctuate based on current system load, brightness, and running applications. If the value is "N/A" or "Calculating...", the OS cannot provide a reliable estimate at that moment.

No. The Battery Status API only exposes basic live metrics. Advanced diagnostics like battery health, cycle count, or temperature are not available through standard web APIs.

Updates are event-driven. The browser fires levelchange events when the battery level changes, but the frequency depends on your operating system's reporting intervals — usually every few percent. You can leave this page open; it will reflect changes automatically.