I can't speak for the TrueStart line of batteries specifically, but I can say 6 years is a long time for most other battery manufacturers to operate without issue.Hmmm… not sure. Maybe the original if that possible? So 6 years
I'm drawing experience from whatever OEM batteries are in Honda, Nissan, Ford, along with NAPA legend batteries and am located in NC. I'm lucky to get 5 years out of my batteries.