in www/battery.js [32:44]
var Battery = function () {
this._level = null;
this._isPlugged = null;
// Create new event handlers on the window (returns a channel instance)
this.channels = {
batterystatus: cordova.addWindowEventHandler('batterystatus'),
batterylow: cordova.addWindowEventHandler('batterylow'),
batterycritical: cordova.addWindowEventHandler('batterycritical')
};
for (var key in this.channels) {
this.channels[key].onHasSubscribersChange = Battery.onHasSubscribersChange;
}
};