My current car, a 2006, is still on the original factory battery. I had it load tested last fall and it was still putting out 10A over its rating. The battery is a sealed type that lives in the trunk, with a vent tube that runs down through the floor of the trunk. Since the 2006 cars came out in 2005, the battery is at least 10 years old, which is the best life I’ve ever gotten out of a battery, and it shows no signs of flagging. I attribute the long life to the battery being insulated from extremes of heat and cold, being in the trunk. (also it’s obviously a quality battery and it has never been run dead to my knowledge) The next longest-lived battery I had lasted over 8 years, and it lived under the hood of my old 1994 vehicle. It was run low once but never totally dead. It came from a local chain that claims to have “Batteries for everything”. (and they haven’t been wrong so far) The worst was a series of bad warranty replacements from a local “Farm and Fleet” type of store, the longest lasting about 3 years. I don’t want to find myself stranded, but at this point it seems almost like a challenge to see how long the original battery will make it. (I’ve been having it tested for the last 3 years due to its age)
What kind of luck have you had?