As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
Aircraft 883 flight 5082 from CVG to CLT; During cruse flight the battery over-temp light illuminated. Aircraft diverted into Lexington and landed with no other problem. No emergency was declared. Maintenance from Charlotte removed and replaced the main battery. System ops checked good and aircraft was returned to service.