How To Fill Acid In Battery. By adding the acid just before use the battery will always be fresh. The proper fill level according to battery manufacturers is approximately 14-inch below the fill well bottom.

Add distilled water to the lead-acid battery. Best way is to record the acid concentration at full charge when. The proper method recommended by most battery manufacturers is to add enough water so that the cell plates are completely submerged but not so much that the water is up to the battery case cell cap vents.
To add water to a car battery you will firstly need to remove the cell vent tops.
The fluid in your lead-acid battery is called electrolyte. Best way is to record the acid concentration at full charge when. While a battery is charging the density of the electrolyte solution will increase. Let the acid drain and then sit for at least 15 minutes.

