BATTERY NEGATIVE TERMINAL BECAME DISCONNECTED WHILE DRIVING. CAR LOST ALL ELECTRICAL FUNCTIONS. COULD NOT REMOVE KEY FROM IGNITION; COULD NOT OPEN TRUNK TO ACCESS BATTERY; COULD NOT TURN ON HAZARD LIGHTS; COULD NOT ACCESS FLARE OR REFLECTOR; INTERNET SEARCH SEEMS TO INDICATE THIS IS A COMMON PROBLEM DUE TO A DESIGN FLAW IN THE QUICK RELEASE MECHANISM ON THE NEGATIVE BATTERY TERMINAL. FORTUNATELY THE CAR CAME TO A STOP AT A WELL LIT INTERSECTION ON A ROAD WITH NO INCLINE. *TR