WHILE TRAVELING SLIGHTLY DOWNHILL ON A FREEWAY, IN 10-15MPH STOP AND GO TRAFFIC......THE BRAKES FAILED ON MY ENERGI. I WAS APPLYING THE BRAKES A LITTLE, GETTING BACK SOME EV CHARGE; WHEN THE CAR IN FRONT STOPPED AND WHEN I PUSHED HARDER ON THE PEDAL IT WENT TO THE FLOOR AND THE BRAKES FAILED......CAUSING AN ACCIDENT. *JS