What happens when you throw a car battery in water?

I know you’re not supposed to get your car’s battery wet (or anything under the hood, really), but I’m just curious—what happens when you throw a car battery in the water?

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Answer provided by
Kathryn Mae Kurlychek
Answered on Jul 14, 2022
No matter what, it won’t be good. Throwing a car battery in water will cause damage to the battery, including its electrodes, wires, and more. In addition, if the water gets inside, it can dilute the battery acid—and in some cases, the battery could explode!
That’s why dumping car batteries in lakes or oceans is illegal. A battery’s lead compounds and other chemicals are likely to leak out when it’s damaged, polluting water, threatening aquatic ecosystems, and posing a health threat to residents.
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