The BBC reports:
Surgeons are warning of the potentially deadly risk posed to young children by button batteries.
If accidentally swallowed, the small, round batteries can get lodged in the oesophagus and burn a hole through its lining.
London’s Great Ormond Street Hospital has seen a big increase in cases in the past year.
Surgeon Kate Cross said: “Button batteries should be treated like poison and kept out of reach of children.”