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/DOM

navigator.battery

Obsolete since Gecko 50 (Firefox 50 / Thunderbird 50 / SeaMonkey 2.47)
This feature is obsolete. Although it may still work in some browsers, its use is discouraged since it could be removed at any time. Try to avoid using it.

The battery read-only property returns a BatteryManager provides information about the system's battery charge level; provides also some new events you can handle to monitor the battery status. This implements the Battery Status API; see that documentation for additional details, a guide to using the API, and sample code.

The battery property has been removed in favor of the standard Navigator.getBattery() method, which returns a battery Promise. Its support is still partial though.

Syntax

var battery = navigator.battery;

Specifications

Specification	Status	Comment
Battery Status API The definition of 'Navigator.battery' in that specification.	Candidate Recommendation	Initial definition

Browser compatibilityUpdate compatibility data on GitHub

	Desktop
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	38	?	16 — 50 16 — 50 Removed in favor of `navigator.getBattery()`. The Battery API was supported on Android, Windows, and Linux with UPower installed. Support for macOS was available starting with Firefox 18. 11 — 16 Prefixed Prefixed Requires the vendor prefix: moz 10 — 16 Disabled Disabled From version 10 until version 16 (exclusive): this feature is behind the `dom.battery.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	No	No	No

	Mobile
	Android webview	Chrome for Android	Edge Mobile	Firefox for Android	Opera for Android	iOS Safari	Samsung Internet
Basic support	?	38	?	16 — 50 16 — 50 Removed in favor of `navigator.getBattery()`. The Battery API was supported on Android, Windows, and Linux with UPower installed. Support for macOS was available starting with Firefox 18. 14 — 16 Prefixed Prefixed Requires the vendor prefix: moz 10 — 16 Disabled Disabled From version 10 until version 16 (exclusive): this feature is behind the `dom.battery.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	No	No	?

navigator.battery

Syntax

Specifications

Browser compatibilityUpdate compatibility data on GitHub

See also