The Defibtech DCF-2003 is a high-performance lithium manganese dioxide battery pack designed for Lifeline VIEW, ECG, and PRO AEDs. With a 4-year standby life and capacity for up to 125 shocks or 8 hours of continuous operation, it ensures your AED is always rescue-ready. Factory-sealed and FDA-cleared, this genuine OEM battery is easy to install and features both visual and audible low-battery indicators for added safety.