As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MAINTENANCE CHECK, FOUND EMERGENCY BATTERY FAULT ECAM APPEARED DURING EXTERIOR EMERGENCY LIGHT TEST. TROUBLESHOT IAW FIM 33-50-00-810-813-A. R & R MID EMERGENCY LIGHT BATTERY ASSY. CHECKED NORMAL IAW AMM 33-50-01. AIRCRAFT OK FOR SERVICE.