How To Add Distilled Water To Ups Battery. You didnt mentioned the brand name of that. The distilled water will bubble when the battery attains full charge and might overflow.

The proper fill level according to battery manufacturers is approximately 14-inch below the fill well bottom. After charging add enough water to bring the level to the bottom of the vent about ¾ below the top of the cell. Distilled water can be purchased at most grocery stores.
Attach the battery charger hook up the terminals to the battery in question and turn on the charger.
This video about repairing old ups lead acid battery at homeusing distilled water for lead-acid battery but some battery not repairable using this method. Its important to note that battery owners should never add sulfuric acid to their battery. This video about repairing old ups lead acid battery at homeusing distilled water for lead-acid battery but some battery not repairable using this method. If you observe a red mark on the indicator it is time to refill the battery with distilled water.

