Not as good as I hoped, not as bad as you suggest?
"
What Tesla's Battery Warranty Says About Degradation
Like any car company, Tesla designs its products and its warranties so that the company doesn't burn through cash replacing parts at its own expense. You might think of the battery warranty in a Tesla as a worst-case scenario. In the highly unlikely situation that the battery dies the same day the warranty expires, what's the earliest you might be on the hook for an expensive battery replacement?
Before 2020, Tesla provided an eight-year, unlimited-mileage warranty on
Model S and
Model X batteries and drive units. That guarantee has since been revised to eight years or 150,000 miles for those vehicles. Tesla's less expensive models have shorter mileage limits.
The Model 3 RWD is covered for
8 years or 100,000 miles, while Performance, Long Range AWD, and Standard Range AWD versions of the Model 3 and
Model Y are guaranteed for 8 years or 120,000 miles. The company specifies its batteries will retain at least
70 percent of their original capacity (also known as 30 percent degradation) during the warranty period. In other words, as long as
a 303-mile Model Y Performance is still storing enough energy to cover at least 212 EPA-rated miles on a full charge, it's performing as intended.
What Tesla Says About Battery Lifespan
According to Tesla's 2021 impact report, its batteries are designed to last the
life of the vehicle, which the company estimates as roughly
200,000 miles in the U.S. and 150,000 miles in Europe. Tesla's own data show Model S and X batteries retain about 90 percent of their original capacity on average over 200,000 miles of use.
Tesla CEO Elon Musk also once tweeted that the battery pack in the Model 3 and Model Y was designed to last
1,500 charging cycles, which translates to about
300,000 miles for Standard Range models and about 500,000 miles for Long Range versions."
Better figures here:
Purchasing a Tesla for the first time brings excitement and plenty of questions, and the largest question is often how long you should expect the battery to last. Combustion engines can last anywhere from 100,000 to 1,000,000 miles with proper maintenance and care, but when it comes to a car...
carbuzz.com
"In Tesla's
2022 Impact Report, the company estimates that after
200,000 miles driven in the US, its EVs only
lose 12% capacity on average. If you head over to different Tesla forums, you'll see plenty of posts from owners who claim similar percentages no matter the year. This is particularly impressive when you think of how far Teslas's battery technology has come since the first Model S hit the road, with the heavily used nickel-cobalt-aluminum lithium-ion chemistry only getting better over time."