Button batteries are the coin (or button)-shaped batteries powering your watch, your hearing aids, your car keys, and —increasingly — your children’s toys. As these small batteries become increasingly common household items, the number of kids swallowing them goes up, too. That’s bad news. Button battery ingestion is dangerous because the batteries can make holes in the esophagus and intestines, leading to tissue damage and even death. Nobody can watch their child every second, so it’s important

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