Several years ago, I bought a new battery from K-mart. I took it home, hooked it up, and immediately fried the entire electrical system. They had charged the battery backwards, Positive was Negative. I took the battery back, the guy at the counter called the parts manager. He checked the battery with a voltmeter, confirmed it was backward, and then said,"Are you sure you didn't hook it up backward?" I replied, "If I had, nothing would have happened." He just stood there for a second, digesting this profound statement, and referred me to their claims department for a full payment for all repairs.