When To Fill Battery With Distilled Water. Battery manufacturers recommend checking water levels frequently usually after charging. The top of the battery.
In a old or dying battery the water should only be filled enough to cover the electrodes. Just below the cell plates. Using anything other then distilled water will cause permanent failure of your battery.
Overfilling will dilute the electrolyte causing it to expand damaging the battery.
One of the simplest choices to make is using distilled water to fill your batteries. One of the simplest choices to make is using distilled water to fill your batteries. Just below the cell plates. Using distilled or deionized water is recommend because it is free from additional minerals you would find in water such as regular tap water.
