[Ooper]

As batteries age or if their charges have been depleted, sulfate crystals tend to build up on the plates when charging affecting their conductivity. There are many commercial units available that will break down these sulfate crystals by pulse charging or equalizing charging. These are not chemical but electronic units. I would think anything added to the pure distilled water in a battery, would lessen the conductivity and reactions as the battery charges and discharges. Just my thoughts.