How long do electric car batteries last?

Modern EV batteries are designed to last many years, and gradual capacity loss is more common than sudden failure. The U.S. Alternative Fuels Data Center notes that several manufacturers offer battery warranties around 8 years or 100,000 miles, while predictive modeling estimates today’s batteries may last about 12 to 15 years in moderate climates and 8 to 12 years in extreme climates.

Actual battery life depends on chemistry, thermal management, climate, charging patterns, mileage, and how the vehicle is used. If you are buying used, check the remaining battery warranty and, when available, the battery’s state of health rather than relying on mileage alone.