The original Defibtech AED includes all mission critical features necessary to provide the most advanced treatment for Sudden Cardiac Arrest. Seven-year replacement battery pack - DBP-2800 This replacement battery pack (DBP-2800) has a standby life (installed in the unit) of 7 years  (including daily, weekly, monthly, and quarterly self-tests), 300 defibrillation shocks, or 16 hours  of continuous operating time.  Each battery pack comes with a new DAC-410 9-volt lithium battery. Adult Defibrillation Pads Package - DDP-100 This package contains one pair of adult defibrillation pads for use with the Lifeline AED and the Lifeline AUTO. These pads are for adult use only (8 years or older) and should be stored with the AED. Package is good for a two-year duration.