Picked up a lil tidbit of info once in a training course in which batteries were discussed and as edward noted above about the water. A person asked the one putting on the course what kind of water and ect. His simple answer was that the average life af a battery is about 5 yrs and the use of distilled versus good 'ol lime water was 3 months. After 5 years or 60 months and about 3-5 gallons of distilled stuff a week, that averages out to about 550.00 to 900.00 spent on distilled fodder@70 cents a gal. I always use plain tap water unless the customer requests distilled or the ion variant. Just my 1 1/2 cents worth.