That's why if mine lasts 4-5 years, I don't complain. I put less than 100 miles on my car since I put the maintenance free AAB yellow cap, group 24 in my car in 2007. It is my first non-lead acid battery and only my third repro battery (all from AAB) since 1989). I do not keep a battery tender on it but do periodically put the tender on it when my battery gets below about a 12.6 volts. I will put the tender on for a day or so and then forget about it the battery a couple of months. I warmed up the A12 and drove the car around the block on 12/3. Previously took it to a car show in mid September. The last time I started it before that was mid-June (trailered it to the Mopar Action show at Maple Grove). I just put the tender on it and it is holding 13.1 volts after only 10 minutes. I will definitely buy another Antique Auto battery when this one quits working.