I went through a series of dead batteries on my '82 Mustang a few years ago, and eventually took the car to an auto electric specialist. Turns out the alternator was OK, but the pulley was the wrong size. Would not spin the alternator fast enough to keep up with the combination of starter, radio, A/C, brake lights, headlights and turn signals, and it eventually drained the battery. I never drove it enough to keep it charged. He installed a smaller pulley and I now keep it on a Battery Tender, so no more battery issues. I hope this guy is still around if I ever have problems with my VX.