I have a CM1936 Black and Decker mower.   I ordered a new battery pack because the battery wasn't taking a charge.  The mower worked fine with the new battery, but now I think the problem is the charger.  But the charger is no longer available.  Can I use a car battery external charger to charge these batteries?
thank yhou
	
		
			
		
		
	
			
			thank yhou