A 3-year old Tesla Model 3 with 217,500 miles still has 88.5% battery capacity and over 300 miles of range.Batteries in EVs typically degrade the most in the first year or two, but then become remarkably stable.EVs can retain nearly 100% battery capacity if they are driven minimally in the first few years.Tesla Model 3 has shown improvements in build quality, becoming more reliable over time.