As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 3614 DURING CRUISE THE CREW REPORTED, RECEIVED A BATTERY OVERTEMP MESSAGE. THE BATTERY TEMPERATURE WENT TO 88 DEGREES CELSIUS. THE CREW DECLARED AN EMERGENCY AND ELECTED TO DIVERT TO RSW. THE AIRCRAFT LANDED WITHOUT INCIDENT. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED BOTH MAIN BATTERIES IAW AMM 24-36-01. THE OPERATIONAL CHECK WAS GOOD AT THIS TIME AND THE AIRCRAFT WAS RETURNED TO SERVICE.