AED pads are disposable, pre-gelled, self-adhesive electrodes (80 cm² active area per pad) for adult/child use, delivering biphasic shocks (150-360J) via chest placement for ventricular fibrillation defibrillation. Features include 24-48 hour monitoring, 50-shock durability, 2-5 year shelf life, and compatibility with major AEDs like Philips/Mindray.