Yes, there is a coin cell memory battery on the system board. The battery can be accessed by seperating the system board and the system-interconnect pcb. The battery is a CR1632. Good luck!
Zoll E-Series Memory Battery
you have to remove the front faceplate assembly, flip upside down and remove the bottom case, pull out the main system pcb becasuse the coin cell is on the top of the Main SYS pcb.
We can do this at ReNew Biomedical to include a full PM/ Calibration with a biomed report.
731-265-6052 ask for Neil