It's been like an old friend to me, it's spent many years in many vehicles, been drained dead more times than I can recall, it even spent a 3 year stint in storage and the whole time I've owned it I never paid it any mind - zero maintanence - nada. This battery has been in my '85 Bronco, '94 Cougar, '96 Chevy work truck, and most recently the family van. If I did the math correctly I got more than 13 years (10 of actual use) out of this battery, I guess I have nothing to do now but buy another.