I have a 2012 leaf that has a similar story. Fell below 9 bars a few weeks after the warranty expired. Nissan said tough luck. We only charged at night (air temps 65-70F). Only changed to 80%. Didn't matter to degradation. Lost another bar last year. Looked into battery replacements and the cost...
I've been following this thread and its very discouraging. We have a 2012 leaf, purchased new and have babied the battery in a climate that rarely drops below 60 degrees F and rarely exceeds 80 degrees F. We saw our battery drop to 8 bars a month after warranty expired (when battery replacement...