Well I will probably will take some heat for this but in July of 2012 I purchased a group 24 yellow cap from antique auto battery, May of 2018, after a long winters nap, I attached the negative cable, put a bit of fuel in the bowl vent of the carb, cranked it over with ease and Wa-La it started! Obviously my point being that the battery still works well after 6 years use. Used the car this past weekend with no difficulties. My luck I probably just jinxed myself!!!