As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOR FLIGHT 4649 THE CREW REPORTED THE NR 3 BATTERY AND CHANGER WERE INOPERABLE. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED EMERGENCY BATTERY PACK NR 3 AND CHARGER IAW WK CARD 33-002. THE AIRCRAFT WAS RETURNED TO SERVICE.