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 the United Kingdom.
health
Estimated battery health
Healthy for its age
A 2021 Audi A6 e-tron on 42,000 miles, charged as “Mostly home AC charging”, would typically hold around 85.6% of its original usable capacity — roughly 50 miles off the original WLTP figure.
Green ≥ 85% · Amber 75–84% · Red below 75%.
Summer range
268 miles
Typical 18°C to 22°C conditions, mixed driving.
Winter range
183 miles
0°C to 5°C with cabin heating — around a 28% 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 29 months and 58,000 miles of cover remain, whichever runs out first. UK manufacturer cover 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 the 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.