!!
critical Omron
Error Code depleted battery symbol appears
Batteries are depleted; display shows no reading.
? What Causes This
Completely discharged batteries
✓ How to Fix It
1. Replace all 4 batteries immediately with new ones as per instructions in section 2.
Source: page 39 of the official manual
From the manual
This error code appears in:
Omron BP7250 Blood Pressure Monitor