https://techcrunch.com/2021/04/06/giving-ev-batteries-a-second-life-for-sustainability-and-profit/

Electric cars and trucks seem to have everything going for them: They don’t produce tailpipe emissions, they’re quieter than their fossil-fuel-powered counterparts and the underlying architecture allows for roomier and often sleeker designs. But the humble lithium-ion battery powering these cars and trucks leads a difficult life. Irregular charging and discharge rates, intense temperatures and many partial charge cycles cause these batteries to degrade in the first five to eight years of use, and eventually, they end up in a recycling facility.

Instead of sending batteries straight to recycling for raw material recovery — and leaving unrealized value on the table — startups and automakers are finding ways to reuse batteries as part of a small and growing market.