How To Check for a Leaky Car Battery Leaking Surfuric Acid with a Multimeter

How to check for a leaky car battery leaking sulfuric acid with a multimeter. If a car battery is leaking sulfuric acid, make sure battery casing is not cracked caused by a bad alternator overcharging the battery. Also, a car battery casing can cracked caused by very low freezing temperature or simply the battery is too old or damaged. Use baking soda to neutralize the acid. If you notice acid on the bottom of the battery, most likely there is a crack somewhere and go ahead and replace the battery. There should be no voltage when checking the battery casing with a multimeter.