As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ABOUT 45 MIN INTO FLIGHT CABIN EMERGENCY LIGHTS STARTED FLASHING, FLASHING BECAME FASTER AS FLIGHT WENT ON. ON GROUND AFTER SHUTDOWN AND TURNING OFF AND BACK ON EMER LIGHTS DID NOT FLASH. CORRECTIVE ACTION: REMOVED AND REPLACED FWD AND AFT E BATTERY. REMOVED FWD PN 7450LS-00 S/N 001052M AFT PN 7450LS-00 S/N 001475M