As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MX INSPECTION THE FIRST 3 SETS OF INTERIOR EMERGENCY LIGHTS AND RH LOWER EXTERIOR EMERGENCY LIGHT TURNS ON AND FADES OFF. MX REMOVED AND REPLACED #2 EMERGENCY BATTERY WITH OPERATIONAL CHECK GOOD. A/C WAS APPROVED FOR RETURN TO SERVICE.