Gerry is right. There were two packs used in 2016 ONLY: the early production S Leafs had the same 24kwh as the 2015 cars, and the later build cars have the 30kwh packs. IIRC, the switchover happened around June of 2016.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.