Diagnostic readings
Understand SOH, cell voltage delta, insulation resistance, fault codes, charge counts and temperature distribution.
Open reading guideCore tool
Used EV battery health risk checker
Enter information available during a viewing and see whether the car looks normal or needs mandatory inspection before payment.
Free local calculation
Enter viewing details and generate a risk report
All calculations run in your browser. Displayed range retention is a risk signal, not true SOH.
After the report, review these next
Negotiation questions
Turn risk results into concrete seller, inspector and contract questions.
View question listRisk guide library
Continue by scenario: range, SOH, pack impact, flood, warranty and more.
Open guide libraryCalculation logic
Displayed range retention
Displayed full range divided by rated range. Below 80% needs review; below 70% is a high-risk signal.
Age and mileage intensity
Annual mileage above 40,000 km requires review for commercial use, frequent fast charging and warranty limits.
Accident and high-voltage safety
Flooding, battery pack impact, major accident or refusal of inspection sharply increases risk.