I dont know if this is possible but it would be pretty cool if the LED on the end would change colors indicating battery level. For example:
 
It would be nice to have a lighted button or to extend the visibility of the LED by making it a cap so you can see it while taking a draw.
	
		
			
		
		
	
			
			- Blue = Full
 - Green = Half
 - Red = (or Flashing as usual) Low / Recharge
 
It would be nice to have a lighted button or to extend the visibility of the LED by making it a cap so you can see it while taking a draw.