EV Battery Degradation Calculator
Battery Health Estimator
Estimate battery capacity based on usage and conditions
Future Range Projection
Project battery health at a future date
Formula
Total Degradation = (Full Cycles × Base Rate × Charging Factor) + (Age × Calendar Rate × Climate Factor); Remaining Health = 100% − Total Degradation; Current Range = Original Range × (Health / 100)
Frequently Asked Questions
How fast do EV batteries degrade?
Most modern EV batteries lose about 2-3% capacity per year under normal conditions. After 8 years, a typical EV retains 85-90% of its original range. Factors like extreme heat, frequent DC fast charging, and regularly charging to 100% can accelerate degradation.
What is the warranty on EV batteries?
Federal regulations require a minimum 8-year/100,000-mile warranty on EV batteries. Most manufacturers guarantee at least 70% capacity retention within that period. Some brands like Hyundai offer 10-year/100,000-mile coverage.
Does fast charging damage EV batteries?
Occasional DC fast charging has minimal impact, but frequent reliance on it (especially in hot weather) can accelerate degradation by 10-20%. Modern EVs have thermal management systems that help, but home Level 2 charging is gentler on the battery.
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