I just bought a Kamry K100.  I am concerned about safety and battery protection.  I understand that a battery should not be discharged below 3.2 volts.  So will one of these 2 devices take care of these issues?  
Also, which carto and/or atomizer will perform good as well as fit under the asthetic cover that comes with the Kamry? Pls and TY!
	
		
			
		
		
	
			
			Also, which carto and/or atomizer will perform good as well as fit under the asthetic cover that comes with the Kamry? Pls and TY!