Defibtech Lifeline AED Electrode Pads Adult (DDP-100). This package contains one pair of adult defibrillation pads for use with the Lifeline AED DDU-100 Series. These pads are for adult use only (8 years or older). Pads should be stored connected to the AED. Pad package has a two-year shelf life. 1PR/PK. Priced per pack.