As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GYE INFLIGHT MIA-LIM CREW REPORTED MAIN BATTERY CHARGER EICAS MESSAGE. FLIGHT DIVERTED GYE LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. SWAPPED OUT MAIN BATTERY CHARGER WITH AUXILIARY POWER UNIT BATTERY CHARGER & MESSAGE CLEARED. REPLACED APU BATTERY CHARGER AT MIA ON 10/02/2013. SYSTEM GROUND CHECKED NORMAL OPERATION CLOSED.