I had no idea how dangerous button batteries are until recently.
If swallowed they can corrode through the oesophagus into other organs such as the lungs, heart or even into the spine causing lasting permanent life changing damage.
Information and safety advice on what to do if you think your child has swallowed a button battery.
BBC Article from last year about button batteries.
Not really an AIBU, but it has been on my mind so I thought I would share here so that more people will see it.