What action should not be done if using AED on a child?

When using an AED on a child, it is crucial to ensure the pads do not touch each other. If the pads come into contact, there is a risk of inefficiency in delivering the shock. The instruction to place the pads correctly ensures that the electrical impulse can effectively travel through the heart, which is essential for restoring a normal rhythm.

Ensuring a clear area is vital for the safety of both the patient and bystanders; checking the battery status is an essential step before using the AED to confirm it's operational; and delivering a shock when indicated is a critical action that can save the child’s life. Each of these actions contributes to the proper application of the AED. However, avoiding pad contact is particularly important to prevent interference with the shock delivery process.