A recent paper on new battery chemistries published by a team including Jeff Dahn, the physics professor from Halifax who is often called Tesla's battery guru. The claimed results suggest a cell with a lifetime of 6,000 cycles. This would translate in a large pack car to the "million-mile battery" which Elon Musk has predicted for Tesla.
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While no car today has a million mile lifetime (Elon Musk has claimed Teslas do) more battery lifetime is always good. Even if the car falls apart after half a million miles, you could still move that pack into a second car. It also reduces the embedded energy in making the batteries and the cost of recycling them. I doubt any car interior is ready for a million miles, nor is the exterior ready in some climates. Frames and electric motors might very well last.
https://www.forbes.com/sites/bradtempleton/2019/09/09/teslas-battery-guru-describes-a-new-cell-with-massive-lifetime/#581b2d176d2f
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