Is Button Batteries (Lithium Cells) Safe for Dogs?
Why it’s a problem
Lithium coin cells generate an electric current against wet tissue, producing a caustic substance that burns through the esophagus even without leaking. Dogs also bite batteries in remotes, key fobs and toys, releasing chemicals into the mouth and gut. Damage begins within 1–2 hours of swallowing.
How to keep your pet safe
Tape battery compartments shut on remotes and toys, and store spare coin cells in child-proof containers out of reach. Check the floor under couches and in play areas for dropped cells. Treat a missing battery from an open pack as an emergency until it is found.
Warning signs to watch for
Drooling, pawing at the mouth, gagging, refusing food, difficulty swallowing, vomiting, coughing, bloody vomit or stool, lethargy; some dogs show no early signs at all.
When to call the vet
Go to a vet immediately for an X-ray — the battery’s location decides everything, and removal is urgent. Do not induce vomiting, since burned tissue tears easily. Bring the battery packaging or note the number printed on the cell, and call a pet poison hotline on the way.
Common questions
My dog swallowed a watch battery — is it an emergency?
Yes, one of the most urgent there is — the battery starts burning tissue within 1–2 hours. Go straight to a vet for an X-ray; do not wait for symptoms.
Can I just wait for the battery to pass in his stool?
No. If it lodges in the esophagus it can burn a hole in hours, and even stomach passage risks late damage. The only safe answer is an immediate X-ray and a removal plan from a vet.
My dog bit a battery but did not swallow it — still serious?
Yes — the chemicals inside cause painful burns to the mouth and tongue. Rinse gently if he allows it, then call your vet or a poison hotline right away.
More household hazards for dogs
This page is general educational information, not a substitute for professional veterinary advice. Every pet is different — if your animal ate or touched something concerning, contact your veterinarian or a pet poison hotline right away. In the US: Pet Poison Helpline (855) 764-7661, ASPCA Animal Poison Control (888) 426-4435 (fees may apply).