As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH - FLIGHT 2312, THE CREW REPORTED THAT THE NUMBER TWO MAIN BATTERY WAS OVERHEATING IN FLIGHT. THE CREW DEACTIVATED THE NUMBER TWO BATTERY, AND THE TEMPERATURE REMAINED CONSTANT UNTIL DESCENT. THE AIRCRAFT LANDED AT IAH WITHOUT INCIDENT WHERE MAINTENANCE REMOVED AND REPLACED THE NUMBER TWO MAIN BATTERY, OPERATIONALLY TESTED WITH NO DEFECTS, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.