As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MCI - FLIGHT 2479, THE CREW REPORTED A NR 2 BATTERY OVERTEMP INDICATION DURING CRUISE. THE AIRCRAFT DIVERTED TO MCI WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE REMOVED AND REPLACED THE NUMBER TWO MAIN BATTERY, OPERATIONALLY TESTED WITH NO DEFECTS, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.