Which action is not recommended while using a defibrillator?

Performing CPR while charging a defibrillator is not recommended because it poses a risk to both the rescuer and the patient. While the defibrillator is charging, it's essential to ensure that no one is in contact with the patient, as the discharge of electricity can cause harm to anyone touching the person receiving the shock. Additionally, during CPR, the focus should be on providing high-quality compressions and ensuring that the patient is in the best position to receive defibrillation when ready. Therefore, it's crucial to stop CPR while the defibrillator is preparing to deliver a shock to avoid complications that could occur during this critical moment. The other options prioritize the safe and effective use of the defibrillator, ensuring the pads are correctly positioned, maintaining a clear zone for safety, and taking precautions to prevent accidental shocks.