Works with all four LIFEPAK models - LIFEPAK 500, LIFEPAK CR Plus, LIFEPAK 1000, and LIFEPAK EXPRESS! Be sure your defibrillator fits the needs of the entire school community. Infant/Child Reduced Energy Electrodes reduce the energy dose that is delivered to the patient by a factor of four. For example, if the AED is set to deliver a dosage of 200J using adult defibrillation pads, the dose will be approximately 50J with the infant/child electrodes.