As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SJU - INFLIGHT MIA-GRU CREW REPORTED ELECTRIC ODOR IN THE COCKPIT AND BATTERY CHARGER CIRCUIT BREAKER POPPED. EMERGENCY DECLARED FLIGHT DIVERTED MIA LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. FOUND BURNING SMELL COMING FROM BATTERY CHARGER. REPLACED BATTERY CHARGER. SYSTEM GROUND CHECK NORMAL OPERATION.