Requires manufacturers of electric vehicles to establish and implement electric vehicle battery management plans.

S 646 (the "Electric Vehicle Battery Management Act") requires electric vehicle manufacturers selling vehicles in New Jersey to create and implement plans for managing used EV batteries. It directly affects EV manufacturers, who must cover all costs for collecting, transporting, reusing, and recycling batteries using environmentally safe methods - prioritizing reuse over disposal. Key provisions include submitting detailed plans within 180 days (including consumer education, reuse strategies, and recycling infrastructure), updating plans every two years, and ensuring manufacturers finance the entire process. The bill aims to address environmental risks from toxic batteries (like lithium-ion) by shifting responsibility from consumers to manufacturers.