The BatteryManager.level property indicates the current battery charge level as a value between 0.0 and 1.0. A value of 0.0 means the battery is empty and the system is about to be suspended. A value of 1.0 means the battery is full. A value of 1.0 is also returned if the implementation isn't able to determine the battery charge level or if the system is not battery-powered. When its value changes, the levelchange event is fired.
BatteryManager.level
Value
A number.
Examples
HTML Content
<div id="level">(battery level unknown)</div>
JavaScript Content
navigator.getBattery().then(battery => { const level = battery.level; document.querySelector('#level').textContent = level; });
Specifications
| Specification |
|---|
| Battery Status API # dom-batterymanager-level |
Browser compatibility
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
level |
38
|
79
|
43-52
|
No
|
25
|
No
|
38
|
38
|
43-52
|
25
|
No
|
3.0
|
See also
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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/BatteryManager/level
