Used EV tools · UK
Used EV battery health & range checker
Estimate how much battery capacity a used electric car has likely lost, what that means for real-world WLTP range in summer and winter, and how much manufacturer battery warranty is left. All figures in miles for United Kingdom.
health
Estimated battery health
Healthy for its age
A 2025 Audi A6 e-tron on 42,000 miles, charged as “Mostly home AC charging”, would typically hold around 94.4% of its original usable capacity — roughly 19 miles off the original WLTP figure.
Green ≥ 85% · Amber 75–84% · Red below 75%.
Summer range
295 miles
Typical 18°C to 22°C conditions, mixed driving.
Winter range
202 miles
0°C to 5°C with cabin heating — around a 31% drop. This is the number that decides whether a used EV works for you.
Battery warranty: Active
Manufacturer battery warranty: 8 years / 100,000 miles, to 70% state of health
Around 76 months and 58,000 miles of cover remain, whichever runs out first. Manufacturer cover in United Kingdom normally pays out only if health falls below 70%.
3-year degradation forecast
Assuming 8,000 miles a year and the same charging habits.
UK used EV inspection checklist
What to check before you hand over any money on a used electric car in United Kingdom.
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.