1996 Mercury Mystique Owner's Manual - Page 214

Battery Replacement If your original equipment battery requires replacement (under warranty), it may in some cases be replaced by a Motorcraft low-maintenance battery. The low-maintenance battery has removable vent caps for checking the electrolyte level and for adding water, if needed. Check your battery's electrolyte level, at least every 12 months or 12,000 miles (20,000 km), in temperatures above 90˚F (32˚C) and more often in temperatures above 90˚F (32˚C). Keep the electrolyte in each cell up to the "level" indicator. Do not overfill the battery cell. If the electrolyte level in your battery gets low, you can add plain tap water to the battery, as long as you don't use hard water, or water with a high mineral or alkali content. If possible, however, try to only fill the battery cell with distilled water. If the battery needs water often, have the charging system checked. RWARNING Batteries normally produce explosive gases which can cause personal injury. Therefore, do not allow flames, sparks or lit tobacco to come near the battery. When charging or working near a battery, always cover your face and protect your eyes, and also provide ventilation. RWARNING Batteries contain sulfuric acid which burns skin, eyes, and clothing. If the acid touches someone's skin, eyes, or clothing, immediately flush the area with water for at least 15 minutes. If someone swallows the acid, have him or her drink lots of milk or water first, then Milk of Magnesia, a beaten egg, or vegetable oil. Call a doctor immediately. 218