I have an O'Reillys Super Start battery in my 92 Cavalier that has been in the car since about June of 2009. The date sticker says E9 which I assume means in was made in May of 09. I keep waiting for it to die but it never does. It was the top of the line Super Start back when I bought it new.
What is the longest life have you gotten out of a battery?
What is the longest life have you gotten out of a battery?