Dallas, Texas - on the exact 1 year anniversary, I got in my car today to find the top bar of my battery is gone. 1 year, 20,200 miles. Garage at home, but not at work. First 6 months was all 100% charge, last 6 was 80% weekdays and 100% weekends. QCd numerous times (over 20 at least), and QCd twice in one day only once.
This should start mirroring arizona since Texas cars have been around for just as long, but have a slightly lower temperature, but still greater than the west coast. It looks like this is definitely a trend and not an "isolated incident" as Nissan is calling it. I do have my 1 year battery check tomorrow. We shall see what the dealership says.