As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 5795 - FLIGHT CREW DIVERTED FLIGHT ALB-ORD TO BUF DUE TO BATTERY NR 1 OVER TEMPERATURE INDICATION INFLIGHT. CREW LANDED ACFT UNEVENTFULLY. MX REMOVED AND REPLACED MAIN BATTERY NR 1 AND PERFORMED OPERATIONAL CHECK SUCCESSFULLY. ACFT WAS APPROVED FOR RETURN TO SERVICE.