Check your laptop or phone battery level and charging state from the browser, with an estimate of time to full when charging or time left on battery. The reading updates by itself while the page is open, so you can watch how fast a charger or cable really works. Practical tips help your battery last longer.
loading toolHow to check battery status
- Press Check battery.
- Read the level, charging state and time estimate.
- Leave the page open to see it update live; plug or unplug to compare chargers.
Good to know
- Comparing two chargers? Note the level, wait 10 minutes on each, and compare how much it rose.
Questions
Why does it say my browser does not share battery information?
Safari, Firefox and all browsers on iPhone hide battery details for privacy. Chrome, Edge, Opera and Samsung Internet on Android, Windows, macOS and Linux show them.
Why is the time estimate missing?
The browser needs a few minutes of charging or use to make an estimate, and some devices never give one. Leave the page open for a while and check again.
Is 100% charging bad for my battery?
Not dangerous, but lithium batteries age a little faster when kept full and warm for long periods. Many phones offer an “optimised” or 80% charging setting; use it if you charge overnight.
Is my data private?
Yes. Everything happens inside your own browser: nothing you type or choose is uploaded to us or anyone else.
Is it free?
Completely free, with no sign-up, no watermark and no limit on how many times you use it. Light ads keep the site running.
