Check Battery Status Online
A free browser-based battery checker that displays your device battery level, charging status, and estimated time remaining. Tracks discharge rate over time with a live graph and session event log — all processing happens locally,
How to Check Battery Status
Access from any device with Chrome, Edge, or Opera browser.
Battery level, status, and time remaining appear instantly.
Keep the page open to track discharge rate and view the live graph.
Configure a battery level alert to get notified when it reaches a specific percentage.
Monitor your device battery level, charge speed, and drain rate in real time
Browser Not Supported
The Battery Status API is not available in your browser. Firefox removed it for privacy reasons, and Safari/iPhone have never implemented it.
Try opening this page in Google Chrome, Microsoft Edge, or Opera.
Why? Browser vendors like Mozilla and Apple disabled this API to prevent websites from tracking users based on their battery level — a privacy measure.
Features
FAQ
Which browsers support this tool?
Chrome, Edge, Opera, and Chromium-based browsers support the Battery Status API. Firefox removed support in version 52, and Safari has never implemented it.
Does this tool send my battery data to a server?
No. All battery information is read directly from your device using the browser Battery Status API. Nothing is uploaded or stored remotely.
Can this tool show battery health or capacity?
The Battery Status API provides level, charging state, and time estimates. True battery health (cycle count, design capacity) requires OS-level access and is not available through browsers.
Why does my time remaining show infinity?
Some devices report infinite time when on AC power without charging, or when the OS cannot estimate remaining time. This is a browser/OS limitation.
Does this work on iPhone?
No. Apple Safari does not support the Battery Status API on any platform (iOS, iPadOS, macOS). Use Chrome on Android or a Chromium browser on desktop.
How accurate is the discharge rate?
The rate is calculated from observed level changes during your session. Longer monitoring provides more accurate results. Note that browsers may round values for privacy.
We can — and it's free! Just send us a quick message with your idea. If you'd like to discuss it in detail, leave your email and we'll get back to you. You can stay anonymous.
