Parents are being warned about the dangers of button batteries following the death of a four-year-old Queensland girl after swallowing one.

Kidsafe estimates that about four children across Australia are admitted to emergency departments each week with an injury related to the batteries.

Kidsafe Victoria president Robert Caulfield said the batteries, commonly found in toys, remote controls and watches, posed a severe and little-known risk to children.

''If swallowed, these coin-sized batteries can get stuck in a child's throat,'' he said.