https://www.zmescience.com/science/teslas-new-batteries-could-last-for-one-million-miles-or-two-decades-of-energy-storage/ This is the facts. Tesla’s electric vehicles are designed to last a very long time. That’s because Elon Musk wants to, at some point, launch a huge fleet of autonomous taxis, and the economics of this venture only make sense if each car can operate for hundreds of thousands of miles, preferably around a million.
While the other parts are already up to the task, the lithium-ion batteries are rated for only 300,000 miles (480,000 km).
However, Tesla researchers say that they’ve now completed tests showing the new battery pack they’re working on could last for up to a million miles (1.6 million km) or 20 years of operation if used for energy storage in a home or by a utility. That’s two to three times longer than current commercially available battery packs offered by Tesla.
The new battery is based on a next-generation single-crystal nickel-manganese-cobalt (NMC) cathode, as well as a new electrolyte.