Battery Status Viewer
Live charge level and time remaining.
How to use
- 1 Open the tool on a device that exposes the Battery API.
- 2 Read the live charge percentage and charging state.
- 3 Check the estimated time to full or to empty.
- 4 Copy the report if you want to keep a snapshot.
About Battery Status Viewer
The Battery Status Viewer surfaces what the browser knows about your device battery in a clean, live-updating panel.
It shows the current charge as a percentage and a progress bar, whether the device is plugged in and charging, and an estimate of the time remaining — either time to a full charge while charging, or time until empty while running on battery.
The display refreshes automatically as the values change, so you can watch the percentage tick up while charging or down while in use, which is handy for spotting a flaky charger, sanity-checking a power-management feature you are building, or just keeping an eye on a laptop during a long session.
The readout is one click away from a copyable report if you want to record a snapshot.
All of this comes from the browser Battery Status API and stays entirely on your device — nothing about your power state is uploaded, logged or stored by this page.
Support varies between browsers, so if the API is unavailable a clear message explains that rather than showing misleading numbers.
The estimated times are the operating system best guesses and naturally shift as your workload changes.
FAQ
Why does it say the Battery API is unavailable?
Several browsers, including Firefox and Safari, have removed or never shipped the Battery Status API for privacy reasons. In those browsers the viewer cannot read battery data and says so.
Why is the time estimate not exact?
The time to full or empty is provided by your operating system and depends on current power draw, so it updates and fluctuates as your workload changes.