Nissan Leaf battery reliability.

Almost 100 percent of all batteries packed in 35,000 Leafs sold in Europe since 2010 are in perfect working condition as Nissan claims to have exchanged only 0,01 percent. The data relies on the Japanese carmakers own telemetric system Carwings which found only three battery failures so far.
autovolt-magazine.com, electriccarsreport.com, youtube.com (video)