Philips MRx/XL/XL+ Pediatric Plus Infant/Child Electrode Pads - Plug Style 5pk. Expiration date 06/2018. These are fully functioning AED electrode pads for use on children up to 8 years of age or up to 55 lbs. (25 kg.) in body weight. When used, these electrode pads reduce the energy level administered to the patient from the adult dose of 150 joules to a child dose of 50 joules. To be used with the HeartStart MRx, XL or XL+ ALS defibrillator/monitors only. Not for use with Philips AEDs.