Tesla Model S and Model X owners can sleep well as battery capacity in these cars don't change much over mileage.

According to the MaxRange Tesla Battery Survey, conducted for some time by Merijn Coumans in the Netherlands via the Dutch-Belgium Tesla Forum, it seems that battery capacity fades by around 5% in the first 50,000 km (31,000 miles) and then degradation slows down to just 1% per 50,000 km or so.

Read Also - Nissan LEAF 30-kWh Battery Degrades More Rapidly Than 24-kWh Pack

The trendline shows 91% of capacity left after 270,000 km (nearly 170,000 miles)! At least that's the average.

If the trend continues that way, theĀ 80% mark would be reached after 820,000 km (510,000 miles)... and still you can use the car with 80% range. Impressed? We certainly are.

Tesla Model S battery degradation data (Source: Steinbuch)

Tesla Model S battery degradation data (Source: Steinbuch)

Tesla Model S battery degradation data (Source: Steinbuch)

Tesla Model S battery degradation data (Source: Steinbuch)

Source: Steinbuch, MaxRange Tesla Battery Survey