As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 3559 THE CREW REPORTED THAT DURING CLIMB AFTER TAKEOFF THE NR 2 BATTERY OVERTEMP WARNING CAME ON "71" C. THE CREW DECLARED AN EMERGENCY AND RETURNED TO MIA. THE AIRCRAFT LANDED WITHOUT INCIDENT. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE NR 2 BATTERY. THE OPERATIONAL CHECK WAS GOOD IAW W/C 24-600-00. THE AIRCRAFT WAS RETURNED TO SERVICE.