BatteryManager.dischargingTime

Obsolete
This feature is obsolete.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.

Indicates the amount of time, in seconds, that remains until the battery is fully discharged.

Even if the time returned is precise to the second, browsers round them to a higher interval (typically to the closest 15 minutes) for privacy reasons.

Syntax

var time = battery.dischargingTime

On return, time is the remaining time in seconds until the battery, which is a BatteryManager object, is fully discharged and the system will suspend. This value is Infinity if the battery is currently charging rather than discharging, or if the system is unable to report the remaining discharging time.

Example

HTML Content

<div id="dischargingTime">(discharging time unknown)</div>

JavaScript Content

navigator.getBattery().then(function(battery) {

    var time = battery.dischargingTime;

    document.querySelector('#dischargingTime').textContent = battery.dischargingTime;
});

Specifications

Specification	Status	Comment
Battery Status API	Candidate Recommendation	Initial definition

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`dischargingTime` Deprecated	Chrome Full support 38	Edge Full support 79	Firefox No support 16 — 52 No support 16 — 52 No support 10 — 16 Prefixed Prefixed Implemented with the vendor prefix: moz Full support 52 Notes Disabled Notes Disabled by default in Firefox 10, but can be enabled setting the preference `dom.battery.enabled` to `true`. Starting with Firefox 11, `mozBattery` is enabled by default. The Battery API is currently supported on Android, Windows, and Linux with UPower installed. Support for MacOS is available starting with Firefox 18. Firefox also provides support for the deprecated `navigator.battery`. Disabled From version 52: this feature is behind the `dom.battery.enabled` preference. To change preferences in Firefox, visit about:config. Full support 72 Notes Notes From this version onwards, `BatteryManager` is only available in chrome/privileged code.	IE No support No	Opera Full support 25	Safari No support No	WebView Android Full support 40	Chrome Android Full support 38 Notes Full support 38 Notes Notes Values for `BatteryManager.chargingTime` and `BatteryManager.dischargingTime` are always equal to `Infinity`.	Firefox Android No support 10 — 16 Prefixed No support 10 — 16 Prefixed Prefixed Implemented with the vendor prefix: moz No support 16 — 52 Notes Disabled Notes Disabled by default in Firefox 10.0, but can be enabled setting the preference `dom.battery.enabled` to `true`. Starting with Firefox 11.0, `mozBattery` is enabled by default. The Battery API is currently supported on Android, Windows, and Linux with UPower installed. Support for MacOS is available starting with Gecko 18.0 (Firefox 18.0 / Thunderbird 18.0 / SeaMonkey 2.15). Firefox also provides support for the deprecated `navigator.battery`. Disabled From version 16 until version 52 (exclusive): this feature is behind the `dom.battery.enabled` preference. To change preferences in Firefox, visit about:config.	Opera Android Full support 25	Safari iOS No support ? — ?	Samsung Internet Android Full support 3.0 Notes Full support 3.0 Notes Notes Values for `BatteryManager.chargingTime` and `BatteryManager.dischargingTime` are always equal to `Infinity`.

Legend

Full support: Full support
No support: No support
Deprecated. Not for use in new websites.: Deprecated. Not for use in new websites.
See implementation notes.: See implementation notes.
User must explicitly enable this feature.: User must explicitly enable this feature.
Requires a vendor prefix or different name for use.: Requires a vendor prefix or different name for use.