GE Dash 3000 Service Manual page 246

Error Log
9-22
Assembly Drawings: Theory Of Operation
50 input errors and 50 output errors are retained in static RAM backed
up by a lithium battery soldered onto the processor/power management
PCB. Contents are retained for at least five years, provided that you
exercise caution when you handle the board to prevent inadvertently
discharging the battery (e.g. when you ship the board for problem
diagnosis).
Dash 3000/4000 Patient Monitor
2000966-339
Revision A