When activating a dry battery, only electrolyte will be added.  Once the battery has been activated, only distilled water will be added to top-up the cells.

To calculate the amount of acid. 


Begin with the rated wet weight of battery; 


Ex:   S6 L16-HC = 55.5kg


subtract dry weight;


S6 L16-HC = 42.5kg 


This means 13kg is the total weight of acid in the 3 cells. 


Divide weight of acid (13kg) by strength of acid (1.265 specific gravity) as 1.265 specific gravity equates to 1.265 grams/litre  (water = 1.000 grams/litre)


13/1.265 = 10.28L this is the amount of acid. 


11 L should be acquired to cover spillage.