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>and due to powertrain longevity, they’ll be in much better shape versus a combustion counterpart at similar mileage

I keep hearing people say this and have never seen any proof. How do you know batteries wear out slower than engines?

Here's one example: Tesloop operates a Tesla only taxi service in southern California. 6% battery degradation over the first 194,000 miles. Battery was replaced at this point, and the subsequent one had 22% degradation over an additional 130,000 miles, but this is thought to be related to frequent supercharging, and frequent supercharging to 95-100% state of charge (not recommended).

https://www.teslarati.com/tesloop-tesla-model-s-400k-miles-b...

There are websites where users report their data. See some of the compilations here

https://www.findmyelectric.com/blog/how-long-does-a-tesla-ba...

"Over the years, the Model S has shown a battery degradation of less than 20% over 300,000 miles from Tesla owner reports on Plug-In America (manufacturing years 2012-2019)."

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