I purchased an iPhone app called Tessie several months ago. In addition to all the functions available in the official free Tesla app, it tracks a lot more useful data. It does live trip tracking, and it also gives more details on charging, including battery life. Here is my Tesla S:
I purchased the Tesla in December 2016, so the car and battery are six years old. The car has about 76k miles, with most of the mile being driven during the first few years. From the data presented, I am already at 10.5% degradation already. There is another chart that shows maximum range at 100% charge.
This correlates with the 10% degredation since the maximum range when the car was new was 242 miles. I think I have mentioned before that my Tesla has never been driven outside of Los Angeles and Orange County. I thought about driving to Las Vegas since I have free Supercharging, but dialysis then COVID has kept me mostly at home.
Life with chronic diseases 