As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A PREFLIGHT INSPECTION THE CREW NOTICED THE NUMBER 4 EMERGENCY LIGHT BATTERY FAILED TO HOLD A CHARGE. AIRCRAFT REMOVED FROM SERVICE. REMOVED AND REPLACED THE NUMBER 4 BATTERY AND CHARGER ASSEMBLY. OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.