What is the battery degradation of a Tesla after 7 years?

[DeValeria]

After 7 years, the maximum battery degradation of a Tesla does not exceed 30%. Here is the warranty information about electric vehicle batteries: 1. National regulations: Electric vehicles should provide an 8-year or 150,000-kilometer warranty for the battery, and the battery degradation during the warranty period should not exceed 30%. Tesla has made a product quality guarantee commitment for the power battery and drive assembly. If there is a serious degradation problem during the battery warranty period, the replacement is free. 2. Warranty period: The Tesla Model 3 equipped with a standard range or medium range battery has a warranty period of 8 years or 160,000 kilometers for the battery and drive assembly, and the battery capacity is guaranteed to be at least 70% during the warranty period.

[Noah]

My Tesla has been driven for a full 7 years, and the battery degradation is roughly between 12% to 15%, varying based on my daily commuting habits and charging methods. I'm the type who drives gently, charging two to three times a week, mostly slow charging at home, and rarely using fast-charging stations. Battery health is actually influenced by many factors, like the high temperatures in southern summers, which can accelerate battery degradation, so I make sure to park in the shade. Tesla's app has a battery report feature that allows real-time monitoring of remaining capacity, which is very convenient. If degradation exceeds 20%, it might affect the range—I can still manage around 300 kilometers now, which is barely sufficient. I recommend getting a check-up at the service center every six months to prevent unexpected issues, after all, the battery is the core part of an electric vehicle.

[KyleDella]

From a battery technology perspective, Tesla's vehicle lithium-ion batteries typically degrade at an average annual rate of 1% to 2%, with approximately 7% to 14% capacity loss after 7 years of use. Daily factors such as frequent fast charging or deep discharging can accelerate this process, particularly in high-temperature regions. Although the battery management system optimizes durability, capacity decline still occurs with prolonged usage. Data indicates that most 7-year-old vehicle batteries maintain over 80% state of health, which is considered reasonable and can be verified via diagnostic tools. For maintenance, avoiding extreme charge/discharge cycles can extend lifespan. Combined with Tesla's 8-year warranty, battery degradation isn't a major concern and shouldn't cause excessive worry.

[EmmettDella]

As a frequent visitor to the used car market, I pay close attention to the battery degradation of 7-year-old Teslas. The estimated range is between 10% and 20%, depending on the vehicle's usage history. When buying used, always check the battery report using the Tesla App or have a professional shop test the remaining capacity. High degradation means poor range and directly impacts the car's value—I've seen some 7-year-old Model 3s worth only half their original price. In practical terms, if the degradation is below 15%, it's still a decent deal; if it's higher, you should negotiate or walk away, as the cost of a new battery is high. I recommend choosing a used car with complete maintenance records for greater safety and reliability.