I once owned a Volvo 746 GL. I bought a new battery for the car from Kwik Fit. About a week later, on the drive to work, the car went into limp mode. I called out the AA. The mechanic discovered that the new battery had alternative round lead tapers fitted over the flat terminals sticking out of the battery case. This was obviously a cost saving design; some cars use a flat connection, my car used a round tapered lead cone. One of the cones had come off its terminal while the car was running; this had caused an electrical spike which destroyed the cars CPU. With help from the AA I got Kwik Fit to cover my costs in getting the car fixed. Take care when choosing a new 12v battery.