Depends on the technology and how well they're thermally managed. Lithium iron phosphate cells are starting to show up in lower-end EVs and those could last a

Depends on the technology and how well they're thermally managed. Lithium iron phosphate cells are starting to show up in lower-end EVs and those could last a very long time. Really, the thing with old batteries isn't so much that they degrade (though a few cars had problems with it like the early Nissan Leafs), but rather that the technology is getting better all the time, and even if degradation isn't a factor, a twenty-year-old battery will be based on twenty-year-old tech, whereas newer cars will be have more range, charge more quickly, and be lighter.