The HeartSine® Samaritan® Adult Pad-Pak™ includes a combination battery and adult electrode set. Monitoring the expiration date for these AED accessories has never been easier. With a 4-year lifespan, the Pad-Pak™ has one single expiration date which makes maintaining the HeartSine® Samaritan® PAD very easy. Each adult Pad-Pak™ is capable of producing 60 shocks or 6 hours of continuous monitoring.