← OS Integration
Battery Status
Probing…Battery Status is a web platform capability in the OS Integration category. Charge level and charging state. Supported in Chromium 38+; not available in Firefox and Safari. Requires a secure context (HTTPS or localhost).
Secure context
Try it
Loading demo…
Code
const battery = await navigator.getBattery()
console.log(battery.level, battery.charging)
battery.addEventListener('levelchange', () => {
console.log('now at', Math.round(battery.level * 100), '%')
})Browser support
Chromium
38
Firefox
No
Safari
No
Frequently asked questions
Which browsers support Battery Status?
Supported in Chromium 38+; not available in Firefox and Safari.
Does Battery Status require HTTPS?
Yes. Battery Status needs a secure context, so it only works over HTTPS (or on localhost during development).
What is Battery Status used for?
Charge level and charging state.
Can I try Battery Status in my browser?
Yes. shwcs.net runs a live Battery Status demo that probes your current browser and lets you try the API. Everything runs locally — nothing is sent anywhere.