How Much Distilled Water To Add To Car Battery. If you find the water level is low you should fill it with distilled water. Distilled water is used to dilute acid lead acid in battery that is required for the flow of electricity in the battery.

Using anything other then distilled water will cause permanent failure of your battery. If your plates are exposed to air in the cells and all you have is tap water then no. From Trailers Truck Tool Boxes To Jump Starters Car Washing Supplies Weve Got It.
Add water never acid to cells distilled water recommended DO NOT OVERWATER.
After adding water on my car battery the discharging period has significantly increased by 45. Answer 1 of 8. If your plates are exposed to air in the cells and all you have is tap water then no. If you observe a red mark on the indicator it is time to refill the battery with distilled water.

