BAck in the old days. That don't seem to be the case anymore.Battery lifespan is time......mileage means nothing.
Typical battery life is between 3 to five years......you know where this is going.
Rob
My last car was a 97 cavalier. Had her for 7 years. The car before was a 94 grand am with the v6. Had that one for 8 years. I sold both cars with the same batteries that came with them. They were working just as good as the day I bought those cars. No need to replace either battery. In fact. I think my last battery purchase was about 25 years ago.