After reading about all these battery fires, I am getting concerned.  I am useing the eGo type usb charger with the wall adapter.  I have 2 and they seem to get a bit warm.  The actual eGo batteries stay cool to the touch. Is this something to be worried about? Is there better eGo type charger out there?  Should I maybe plug it into a serge strip to be extra safe about saving the houses wireing?
Thank you
	
		
			
		
		
	
			
			Thank you