Battery Status API

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Battery Status API,更多时候被称之为 Battery API, 提供了有关系统充电级别的信息并提供了通过电池等级或者充电状态的改变提醒用户的事件。 这个可以在设备电量低的时候调整应用的资源使用状态,或者在电池用尽前保存应用中的修改以防数据丢失。

Battery Status API 向 window.navigator 扩展了一个 navigator.getBattery 方法,其返回了一个battery promise, 完成后传递一个 BatteryManager 对象,并提供了一些新的可以操作电池状态的事件。

例子

在这个例子中,我们同时监听放电状态和电池等级和剩余事件的事件(不论是否正在充电还是在使用电池)。这可以通过监听 chargingchange, levelchange, chargingtimechange, dischargingtimechange 事件完成。

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

  console.log("Battery charging? " + (battery.charging ? "Yes" : "No"));
  console.log("Battery level: " + battery.level * 100 + "%");
  console.log("Battery charging time: " + battery.chargingTime + " seconds");
  console.log("Battery discharging time: " + battery.dischargingTime + " seconds");

  battery.addEventListener('chargingchange', function() {
    console.log("Battery charging? " + (battery.charging ? "Yes" : "No"));
  });

  battery.addEventListener('levelchange', function() {
    console.log("Battery level: " + battery.level * 100 + "%");
  });

  battery.addEventListener('chargingtimechange', function() {
    console.log("Battery charging time: " + battery.chargingTime + " seconds");
  });

  battery.addEventListener('dischargingtimechange', function() {
    console.log("Battery discharging time: " + battery.dischargingTime + " seconds");
  });

});

另见 标准中的例子.

规范

草案 进度 备注
Battery Status API Candidate Recommendation 初步定义。

浏览器兼容性

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
BatteryManager
Deprecated
Chrome Full support 38Edge No support NoFirefox 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 provide 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 52
Notes
Notes From this version onwards, the Battery Status API is only available in chrome/privileged code.
IE No support NoOpera Full support 25Safari No support NoWebView Android Full support 40Chrome 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 provide 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.
Full support 52
Notes
Notes From this version onwards, the Battery Status API is only available in chrome/privileged code.
Opera Android Full support 25Safari iOS No support ? — ?Samsung Internet Android Full support Yes
charging
Deprecated
Chrome Full support 38Edge No support NoFirefox 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 provide 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 52
Notes
Notes From this version onwards, the Battery Status API is only available in chrome/privileged code.
IE No support NoOpera Full support 25Safari No support NoWebView Android Full support 40Chrome 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 provide 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.
Full support 52
Notes
Notes From this version onwards, the Battery Status API is only available in chrome/privileged code.
Opera Android Full support 25Safari iOS No support ? — ?Samsung Internet Android Full support Yes
chargingTime
Deprecated
Chrome Full support 38Edge No support NoFirefox 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 provide 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 52
Notes
Notes From this version onwards, the Battery Status API is only available in chrome/privileged code.
IE No support NoOpera Full support 25Safari No support NoWebView Android Full support 40Chrome 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 provide 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.
Full support 52
Notes
Notes From this version onwards, the Battery Status API is only available in chrome/privileged code.
Opera Android Full support 25Safari iOS No support ? — ?Samsung Internet Android Full support Yes
dischargingTime
Deprecated
Chrome Full support 38Edge No support NoFirefox 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 provide 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 52
Notes
Notes From this version onwards, the Battery Status API is only available in chrome/privileged code.
IE No support NoOpera Full support 25Safari No support NoWebView Android Full support 40Chrome 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 provide 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.
Full support 52
Notes
Notes From this version onwards, the Battery Status API is only available in chrome/privileged code.
Opera Android Full support 25Safari iOS No support ? — ?Samsung Internet Android Full support Yes
level
Deprecated
Chrome Full support 38Edge No support NoFirefox 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 provide 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 52
Notes
Notes From this version onwards, the Battery Status API is only available in chrome/privileged code.
IE No support NoOpera Full support 25Safari No support NoWebView Android Full support 40Chrome 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 provide 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.
Full support 52
Notes
Notes From this version onwards, the Battery Status API is only available in chrome/privileged code.
Opera Android Full support 25Safari iOS No support ? — ?Samsung Internet Android Full support Yes
onchargingchange
Deprecated
Chrome Full support 38Edge No support NoFirefox 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 provide 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 52
Notes
Notes From this version onwards, the Battery Status API is only available in chrome/privileged code.
IE No support NoOpera Full support 25Safari No support NoWebView Android Full support 40Chrome 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 provide 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.
Full support 52
Notes
Notes From this version onwards, the Battery Status API is only available in chrome/privileged code.
Opera Android Full support 25Safari iOS No support ? — ?Samsung Internet Android Full support Yes
onchargingtimechange
Deprecated
Chrome Full support 38Edge No support NoFirefox 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 provide 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 52
Notes
Notes From this version onwards, the Battery Status API is only available in chrome/privileged code.
IE No support NoOpera Full support 25Safari No support NoWebView Android Full support 40Chrome 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 provide 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.
Full support 52
Notes
Notes From this version onwards, the Battery Status API is only available in chrome/privileged code.
Opera Android Full support 25Safari iOS No support ? — ?Samsung Internet Android Full support Yes
ondischargingtimechange
Deprecated
Chrome Full support 38Edge No support NoFirefox 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 provide 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 52
Notes
Notes From this version onwards, the Battery Status API is only available in chrome/privileged code.
IE No support NoOpera Full support 25Safari No support NoWebView Android Full support 40Chrome 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 provide 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.
Full support 52
Notes
Notes From this version onwards, the Battery Status API is only available in chrome/privileged code.
Opera Android Full support 25Safari iOS No support ? — ?Samsung Internet Android Full support Yes
onlevelchange
Deprecated
Chrome Full support 38Edge No support NoFirefox 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 provide 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 52
Notes
Notes From this version onwards, the Battery Status API is only available in chrome/privileged code.
IE No support NoOpera Full support 25Safari No support NoWebView Android Full support 40Chrome 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 provide 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.
Full support 52
Notes
Notes From this version onwards, the Battery Status API is only available in chrome/privileged code.
Opera Android Full support 25Safari iOS No support ? — ?Samsung Internet Android Full support Yes

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.

另见