1. Open the vent caps and look inside the fill wells.
2. Check electrolyte level; the minimum level is at the top of the plates.
3. If necessary add just enough distilled water to cover the plates at this time.
4. Put batteries on a complete charge before adding any additional water.
5. Once charging is completed, open the vent caps and look inside the fill wells.
6. Add water until the electrolyte level is 1/8″ below the bottom of the fill well.
7. A piece of rubber can be used safely as a dipstick to help determine the level.
8. Clean, replace, and tighten all vent caps.
WARNING: Never add acid to a battery.