About the same length is often not the same length.
The only way to overcome this issue, is to stretch the cap spring, or stop using various length batteries.
Jim
	
		
			
		
		
	
			
			The only way to overcome this issue, is to stretch the cap spring, or stop using various length batteries.
Jim
				
		
  and your rattling stops like mine does when holding the button, then ... it  is the "free floating" button ( does it have to float free?? 
  )