Estimate how much of an electric-car battery's capacity and range may remain after a few years and some distance. Enter the vehicle age, mileage and your charging habits to see a reference retention figure. These figures are approximations for general information only and are not a battery health test. Real degradation depends on the exact battery, climate, charge patterns and how the car is used, so treat this as a rough guide only.
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How to Use the Battery Degradation Estimator
Enter the vehicle age, the mileage and your charging habit, then press Estimate to see a reference capacity and range retention.
Reading the results
Capacity retention is about how much of the original battery capacity may remain.
Range retention follows the capacity, so range drops in step.
Calendar loss grows with time; cycle loss grows with mileage and hard charging.
A retention below about 70% is usually when manufacturers consider a warranty claim.
Tips
Keeping the charge between roughly 20% and 80%, avoiding frequent DC fast charging and parking out of extreme heat all slow degradation. The warranty terms of your car always take priority.
Features
Reference capacity and range retention from age, mileage and charging habit
Shows calendar loss and cycle loss separately
Adjusts for gentle or aggressive charging
All processing runs locally in your browser. Your data is not uploaded to any server.
These figures are approximations for general information only and are not a battery health test. Real degradation depends on the battery, climate, charge patterns and use.