HeartSine samaritan Pad-Pak. Adult (includes one set of defibrillation pads and battery). Incorporates one expiration date for worry free maintenance; based on a 4-year shelf-life.. Provides over 6 hours of continuous monitoring or 60 shocks. The PAD-PAK-01 works with the PAD 350, 360, and 450 models. HeartSine brand AEDs operate on Pad-Paks only. Best to always have a fully charged spare Pad-Pak available.