Defibtech Lifeline 7 year Battery

Defibtech Lifeline ca. 7-year battery pack (DBP-2800).
Defibtech's battery technology is nothing short of brilliant! A replaceable 9 volt battery powers the device's regular electronic self-tests leaving the pack available for any emergency use. This "high-use" pack offers up to seven years of standby life. It's another great innovation from Defibtech.