went to the track today. first pass was fine, 3 more and each time the car would cut out real bad. Decided to get it home befor i broke it. Drove 35 miles with no problem. As soon as I pulled off the hiway the car died. Just got it home and the battery is 100% dead. What could do that or did it just short out? It is about 3 years old, took a full charge yesterday.