As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER ACFT SHUTDOWN THE ACFT EMERGENCY LIGHTS, INTERIOR & EXTERIOR, REMAINED ON. TROUBLESHOOTING IDENTIFIED THE NR 1 EMERGENCY BATTERY AS DEFECTIVE PN 640-13530-00 5434-00 SN 000274. THE EMERGENCY BATTERY WAS REPLACED & FUNCTIONAL CHECKS WERE SATISFACTORY.