What would you ask a seller who has no battery-health report?

Without a battery report, start by finding out what evidence is available. Ask for the exact variant, service and repair records, applicable warranty information and permission for an appropriate independent assessment.

Age, mileage and a dashboard range estimate do not establish the remaining usable capacity. Keep battery condition unknown until there is suitable evidence; do not turn a missing report into either a clean bill of health or a diagnosis of failure.

An inspector should explain the method, baseline and limitations of any battery assessment. Those details are more useful than an unexplained percentage.