The battery for the Physio-Control Lifepak 1000 defibrillator has a lifespan of 5 years from the installation date. Regularly monitoring the battery status and replacing it when needed is crucial to ensure the reliability and effectiveness of your defibrillator. If you need to order a replacement battery for the Physio-Control Lifepak 1000 or have any questions about its use and installation, please feel free to contact us. We’re here to assist you in keeping your Lifepak 1000 defibrillator powered and ready for any emergency situation.