'each plate
(	(	(	
			4/32
		)
		 *  4
		 * 36
	)
	 * .4 
)
 * 2
 * 6
 * 20

2 plates per cell, 
6 cells per 12 V battery, 
20 batteries per boat

3/32 = 1296 lbs for 20 batteries
4/32 = 1728 lbs