license: Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the “License”); you may not use this file except in compliance with the License. You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

     Unless required by applicable law or agreed to in writing,
     software distributed under the License is distributed on an
     "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
     KIND, either express or implied.  See the License for the
     specific language governing permissions and limitations
     under the License.

batterystatus

The event fires when there is a change in the battery status.

window.addEventListener("batterystatus", yourCallbackFunction, false);

Details

This event fires when the percentage of battery charge changes by at least 1 percent, or if the device is plugged in or unplugged.

The battery status handler is passed an object that contains two properties:

  • level: The percentage of battery charge (0-100). (Number)

  • isPlugged: A boolean that indicates whether the device is plugged in. (Boolean)

Applications typically should use window.addEventListener to attach an event listener once the deviceready event fires.

Supported Platforms

  • Amazon Fire OS
  • iOS
  • Android
  • BlackBerry WebWorks 5.0+
  • Windows Phone 7 and 8
  • Tizen

Windows Phone 7 and 8 Quirks

Windows Phone 7 does not provide native APIs to determine battery level, so the level property is unavailable. The isPlugged parameter is supported.

Quick Example

window.addEventListener("batterystatus", onBatteryStatus, false);

function onBatteryStatus(info) {
    // Handle the online event
    console.log("Level: " + info.level + " isPlugged: " + info.isPlugged);
}

Full Example

<!DOCTYPE html>
<html>
  <head>
    <title>Device Ready Example</title>

    <script type="text/javascript" charset="utf-8" src="cordova.js"></script>
    <script type="text/javascript" charset="utf-8">

    // Wait for device API libraries to load
    //
    function onLoad() {
        document.addEventListener("deviceready", onDeviceReady, false);
    }

    // device APIs are available
    //
    function onDeviceReady() {
        window.addEventListener("batterystatus", onBatteryStatus, false);
    }

    // Handle the batterystatus event
    //
    function onBatteryStatus(info) {
        console.log("Level: " + info.level + " isPlugged: " + info.isPlugged);
    }

    </script>
  </head>
  <body onload="onLoad()">
  </body>
</html>