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Chrome is a way to get battery objects in the pop up window

I use this code To create pop ups 

  chrome.windows.create ({'url': 'mypop.html', 'type': 'popup'}, function (window) {}) ;   
 But there is a problem redeeming the battery object using this code  
  var battery = navigator.webkitbattery;   
 When I am calling a javascript file on mypop.html page  
 Is this a Chrome security issue that rejects the battery object on the popup page?  
 
 
 It seems that it has been removed from Chrome because  Nevigetrkvebkitbatri  Is undefined

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