What was found
PIT - FLT 2149 - EN ROUTE FROM PHL/STL, AN UNIDENTIFIED ELECTRICAL ODOR WAS NOTED IN THE CABIN. FLIGHT DIVERTED TO PIT AND LANDED WITHOUT FURTHER INCIDENT. NO EMERGENCY WAS DECLARED. MAINTENANCE FOUND THE BATTERY CHARGER CIRCUIT BREAKER TRIPPED. REMOVED AND REPLACED THE BATTERY, BATTERY CHARGER (PN 2-792-02) AND NR 2 TRANSFORMER RECTIFIER UNIT (PN 2-299). RESET CIRCUIT BREAKER. OPERATIONAL CHECK GOOD. (X)