I highly recommend everyone to watch both videos attached to the following Australian Safety regulator’s web page. It’s essential safety information for *anyone* who might have children under five years old in their house.
The Battery Controlled – Button battery safety.
If a child swallows a button battery, the battery can get stuck in the child’s throat and burn through the oesophagus in as little as two hours. Repair can require feeding and breathing tubes and multiple surgeries.
Children under five years old are at the greatest risk.