As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE COCKPIT LOCATION EMERGENCY LIGHTS BATTERY FAILED SCHEDULED FUNCTIONAL TEST. BATTERY ASSEMBLY WAS REPLACED WITH A REPAIRED BATTERY AND NO FURTHER DEFECTS WERE NOTED. THIS REPORT COMPLIES WITH 14CFR PART 135 OPERATOR'S GMM REQUIREMENTS.