Know the battery.
Know the car.
Understand battery condition, real-world range, charging costs and ownership costs before buying a used EV.
Free tools. No sign-up. Your data stays with you.
Illustrative inputs, not a diagnostic result.
Start with what matters.
A closer look at the numbers behind your next EV.
Battery Health Estimator
Turn your range and consumption into an estimated usable-capacity band. See what the numbers can—and cannot—tell you.
Used EV Analyzer
Bring the battery, range, charging, warranty and running costs together before you speak to the seller.
Real-World Range
Plan your driving range around usable energy, realistic consumption and an arrival reserve.
Charging Cost
See the cost of a charging session and your monthly driving, using your own electricity tariff.
Different cars. Different questions.
Battery options, charging context and checks for the viewing.
A range estimate is
only part of the story.
Two cars can show the same range and have different battery conditions. We help you separate evidence from assumptions—and see what still needs checking.
How we work with your dataManufacturer data
Original specifications, with their source and applicable variant.
Reported measurements
Your diagnostic SoH, shown separately and never presented as verified by us.
Calculations
The formulas and numbers behind energy, range and cost.
Estimates
Visible assumptions, sensitivity bands and evidence confidence.
A little knowledge goes a long way.
How to Check Battery Health Before Buying a Used EV
A practical evidence checklist, from identifying the battery to asking for a meaningful diagnostic report.
Read guideHow Much EV Battery Degradation Is Normal?
Why a single annual percentage cannot define the condition of every used EV.
Read guideEV Battery Warranty Explained
Time, distance, capacity thresholds and exclusions all matter when checking a used EV warranty.
Read guideMake sense of the Battery Passport.
Understand the identity, performance and sustainability fields—and the limits of what a digital record can tell you.
Trust starts with showing our working.
Our formulas, confidence labels, sources and limitations are open to inspection.