As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) THE AUX BATTERY HOT WARNING LIGHT CAME ON IN FLIGHT. IAW THE QRH THE CREW SELECTED THE BATTERY OFF. THE BATTERY TEMPERATURE CONTINUED TO RISE SO THE FLIGHT DIVERTED TO THE NEAREST SUITABLE AIRPORT. THE AUX BATTERY WAS REPLACED AND THE ACFT RETURNED TO SERVICE. AUX BATTERY, PN 020413-000, SN 090520007EE68, BATTERY TSO 336, CSO 322. ACFT TSN 57653, CSN 72009.