ngCordova $cordovaBatteryStatus correct use

gistfile1.js

angular.module('starter', ['ionic', 'starter.controllers', 'starter.services',])
    
        .run(function ($ionicPlatform, $cordovaBatteryStatus, $ionicLoading) {

            $ionicPlatform.ready(function () {
               
                // Hide the accessory bar by default (remove this to show the accessory bar above the keyboard
                // for form inputs)
                if (window.cordova && window.cordova.plugins.Keyboard) {
                    cordova.plugins.Keyboard.hideKeyboardAccessoryBar(true);
                    //cordova.plugins.Keyboard.hideKeyboardAccessoryBar(true);
                    //This disables scrolling
                    cordova.plugins.Keyboard.disableScroll(true);
                }
                if (window.StatusBar) {
                    //  required
                    StatusBar.hide();                 
                }

                $rootScope.$on('$cordovaBatteryStatus:status', function (e, result) {                  
 
                    //$ionicLoading.show({template: 'Batery status: ' + result.level,  noBackdrop: true, duration: 2000});             
                    $rootScope.cordovaBatteryStatus.batteryLevel = result.level;       // (0 - 100)
                    $rootScope.cordovaBatteryStatus.isPluggedIn = result.isPlugged;   // bool
                });

                $rootScope.$on('$cordovaBatteryStatus:critical', function (e, result) {
                    $rootScope.cordovaBatteryStatus.batteryLevel = result.level;       // (0 - 100)
                    $rootScope.cordovaBatteryStatus.isPluggedIn = result.isPlugged;   // bool
                });

                $rootScope.$on('$cordovaBatteryStatus:low', function (e, result) {
                    $rootScope.cordovaBatteryStatus.batteryLevel = result.level;       // (0 - 100)
                    $rootScope.cordovaBatteryStatus.isPluggedIn = result.isPlugged;   // bool
                });

            });
            
            //Global object to use in any template
            $rootScope.cordovaBatteryStatus = {};
            //Some dummy values. This will be changed on battery state change.
            $rootScope.cordovaBatteryStatus.batteryLevel = 100;
            $rootScope.cordovaBatteryStatus.isPluggedIn = false;

        });