Ford 1998 Windstar Owner's Manual page 291

Battery recycling symbol
The gases around the battery can explode if exposed to
flames, sparks, or lit cigarettes. An explosion could result
in injury or vehicle damage.
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.
Applying too much pressure on the ends when lifting a
battery could cause acid to spill. Lift the battery with a
carrier or with your hands on the opposite corners.
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