Hello, if you have the battery tested before the winter time in an x of any workshop, you are always asked if there are problems or how old the car and/or the battery is. Then a friendly employee comes, usually without any waiting time and plugs in a device, which probably measures the voltage under load. What comes out of it, you can recognize as layman bad or can hardly interpret it. Am I there a scum, if I think that if you answer the questions always need a new battery?