Used EV tools · US
Used EV battery health & range checker
Estimate how much battery capacity a used electric car has likely lost, what that means for real-world EPA range in summer and winter, and how much manufacturer battery warranty is left. All figures in miles for United States.
health
Estimated battery health
Healthy for its age
A 2024 Acura ZDX on 42,000 miles, charged as “Mostly home AC charging”, would typically hold around 92.2% of its original usable capacity — roughly 24 miles off the original EPA figure.
Green ≥ 85% · Amber 75–84% · Red below 75%.
Summer range
288 miles
Typical 65°F to 75°F conditions, mixed driving.
Winter range
197 miles
25°F to 35°F with cabin heating — around a 31% drop. This is the number that decides whether a used EV works for you.
Battery warranty: Active
Federal battery warranty minimum: 8 years / 100,000 miles
Around 64 months and 58,000 miles of cover remain, whichever runs out first. US cover normally pays out only if health falls below 70%, and salvage or rebuilt titles are excluded.
3-year degradation forecast
Assuming 12,000 miles a year and the same charging habits.
US used EV inspection checklist
What to check before you hand over any money on a used electric car in United States.
How honest is this? These figures come from a published-average degradation model — roughly 2.2% capacity loss a year plus 0.8% per 10,000 miles, adjusted for charging habits. Real packs vary widely by chemistry, climate and how the car was treated, so always confirm with a diagnostic state-of-health reading before buying. Nothing here is a battery scan, and What EV carries no affiliate links.