Long time series advocate here,  the 3s battery never even breaks a sweat. All the mod needs to do is restrict or filter the voltage, much more efficient and easier than boosting.. The amp load in the 3s batteries is 1/3 that of a single cell.  You can kinda liken amperage to the throttle position on a car.  The deeper into the gas the less mileage you get..... As a generalization.  
Still love my onboard lipos.. If your shopping for a new mod right now. . All the haters have caused the manufactures to mostly go back to imrs.. I have very few choices at this time..
	
		
			
		
		
	
			
			Still love my onboard lipos.. If your shopping for a new mod right now. . All the haters have caused the manufactures to mostly go back to imrs.. I have very few choices at this time..