I have been using an ego-t with the double coil cartomizer and really liking it.  I recently bought a 900mAh battery (labelled as Ego-T) but find that it cuts (battery flashes) much sooner than my smaller batteries.  In fact my smaller batteries really don't go into into protection unless I take several long draws.  Is this usual for the larger batteries, or is there perhaps a fault in the protection circuitry?
seems too cut-out at around 4"
	
		
			
		
		
	
			
			seems too cut-out at around 4"