HeartSine Samaritan Adult Pad-Pak - Cartridge Suitable for patients over 8 years old/25kg in weight, the HeartSine Samaritan Adult Pad-Pak contains a battery and a pair of electrode pads, in one simple to replace cartridge component. • For the HeartSine Samaritan PAD 350P, 360P and 500P defibrillators • Electrode Pad Lifespan: 4 years