Valdemar wrote:There is also a theory that the battery "improvements" didn't get to the assembly line until mid-year.
For what its worth. 3-4 months ago before I bought my leaf, Nissan Leaf customer service told me that the 2011-2012 Leaf battery chemistry had problems with cold and hot temperatures, but the 2013-14 chemistry was changed to degrade less in very cold weather. So according to the Nissan rep. 2013-2014 batteries only help in very cold weather but degrade the same as 11'-12' in hot weather. So the 2015 batteries are supposed to degrade much less in both cold and hot weather.
Don't know if this was worth reporting, but here it is.