As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AUS - FLT 3214, THE CREW REPORTED THAT THE NR 1 MAIN BATTERY OVERHEATED IN CLIMB. THE AIRCRAFT DIVERTED TO AUS WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE REMOVED AND REPLACED BOTH MAIN BATTERIES, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.