Ford Mercury Villager 1997 Owner's Manual page 272

Jump-Starting Your Battery
Your vehicle's battery may discharge if you leave the lights or
any electrical equipment on after you turn the engine off. If this
happens, you may be able to jump-start from a booster
battery to start your vehicle.
The gases around the battery can explode if exposed to
flames, sparks, or lit cigarettes. An explosion could result
in injury or vehicle damage.
To protect yourself when charging a battery, always shield
your face and eyes. Make sure that you can breathe
fresh air.
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.
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.
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