As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MESSAGE EMERGENCY LIGHT LOW BATTERY DISPLAYED. REMOVED AND REPLACED EMERGENCY LIGHTS BATTERY IN REF TO MD11 MM 33 51 01 400 802. EMERGENCY LIGHTING BATTERY POWER SUPPLY OPS TEST GOOD IN REF TO MD11 MM 33 51 01 700 802 MD11 IPC 33 51 10 01 005J