Those shiny little coin-shaped batteries are everywhere. Inside key fobs, TV remotes, flashing toys, musical greeting cards, hearing aids, small electronics. They look harmless. They’re not.
If a young child swallows one of these — especially a 20mm lithium coin cell about the size of a nickel — it can get stuck in their esophagus. And when that happens, saliva triggers an electric current. That current causes a chemical reaction that starts burning through the esophagus in as little as two hours. Not days. Hours.
The damage can include holes in the esophagus, vocal cord paralysis, erosion into the airway, or worse. Kids have needed surgery, months on feeding tubes and breathing tubes — and some have died.
Here’s the thing that makes this so dangerous: the battery doesn’t have to be fresh. Lithium coin cells hold a strong enough charge to cause injury even after they’ve been removed from a device. And the battery doesn’t cause pain immediately, so a child might not even tell you they swallowed something.
The symptoms parents need to know — because they look like a lot of other things — include drooling, trouble swallowing, a change in voice, chest pain, coughing, spitting up blood, refusing to eat or drink, or stomach pain. According to Johns Hopkins Medicine, those are the signs to watch for after a potential swallowing incident.
If you even suspect a child swallowed one, don’t wait to see if they feel better. This is an emergency room situation right now. Every minute matters.
For prevention: check that battery compartments on toys and remotes require a screwdriver or tool to open — not just a fingernail. Keep loose batteries completely out of reach. And yes, that includes the batteries in those holiday greeting cards that play music. They’re one of the most overlooked sources.