As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DEN - FLT 621 - EN ROUTE FROM LAS TO PHL, CREW REPORTED A STRONG ODOR OF ELECTRICAL FUMES IN THE CABIN. CREW DECLARED AN EMERGENCY AND DIVERTED TO DEN. FLIGHT LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE FOUND THE MAIN AIRCRAFT BATTERY TO HAVE AN INTERNAL SHORT. REMOVED AND REPLACED THE MAIN AIRCRAFT BATTERY AND THE BATTERY CHARGER PER MM 24-31-11. OPERATIONAL CHECK GOOD. (M)