// Add the notification observer
if (app.ios) {
    app.ios.addNotificationObserver(UIDeviceBatteryLevelDidChangeNotification,
        function onReceiveCallback(notification: NSNotification) {
            var percent = UIDevice.currentDevice().batteryLevel * 100;
            var message = "Battery: " + percent + "%";
            console.log(message);
        });
}
// When no longer needed, remove the notification observer
if (app.ios) {
    app.ios.removeNotificationObserver(UIDeviceBatteryLevelDidChangeNotification);
}

//Register the broadcast receiver
if (app.android) {
    app.android.registerBroadcastReceiver(android.content.Intent.ACTION_BATTERY_CHANGED,
        function onReceiveCallback(context: android.content.Context, intent: android.content.Intent) {
            var level = intent.getIntExtra(android.os.BatteryManager.EXTRA_LEVEL, -1);
            var scale = intent.getIntExtra(android.os.BatteryManager.EXTRA_SCALE, -1);
            var percent = (level / scale) * 100.0;
            console.log("Battery: " + percent + "%");
        });
}
// When no longer needed, unregister the broadcast receiver
if (app.android) {
    app.android.unregisterBroadcastReceiver(android.content.Intent.ACTION_BATTERY_CHANGED);
}