I filed my first claim at 62,000 miles over a year ago, Feb 2015, direct with Nissan. I filed my second claim direct with Nissan August 2015. I filed with BBB in October 2015 and won in February 2016. I got my new battery in March 2016.
In that year I lost 3 more bars in about 10,000 miles driven. I had some major issues with that battery performance but Nissan rejected
two direct claims, even the second one where I offered to split the new battery charges with them!