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