Open any used EV listing. "Battery in great condition." "Still gets 400 km on a full charge." "Never had any issues."
Now ask what a buyer is supposed to do with that. They cannot verify any of it. The person making the claim is the person who benefits from it. And the 400 km figure is a prediction the car generates from recent driving efficiency — it is not a measurement of capacity and it moves with the weather.
So a careful buyer discounts all of it, and prices accordingly. That discount is what an unverifiable claim costs you.
What changes with a certificate
A listing that says:
Battery health certified — Grade B, 86% measured State of Health, tested 14 September 2026. Certificate EVB-CERT-2026-00184, verify at evbatterylab.com.au/verify
is doing something no other listing on that page is doing: making a claim the reader can check for themselves, in ten seconds, without asking you for anything.
Verification shows the issue date, the vehicle's year, make and model, the measured State of Health, its grade and who tested it. It shows nothing about you — no name, no phone number, no email, no address.
That is the point. You are handing a stranger the ability to satisfy their own doubt without having to trust you, which is the exact thing that makes a private sale slow and awkward.
Why this is worth more on an EV than on a petrol car
On a used petrol car, the expensive unknowns are spread across the engine, transmission and structure, and a buyer can get comfortable through a normal inspection and a service history.
On an EV, most of the risk is concentrated in one component that cannot be inspected by looking at it and that costs a substantial fraction of the car to replace. A buyer who cannot assess the battery is being asked to accept the largest single variable on faith.
Remove that, and you have removed the main reason someone hesitates, low-balls, or walks.
Being straight about what it does not do
A certificate does not make a tired battery worth more. If the pack measures 74%, the certificate says 74%, and it says so permanently — we cannot edit an issued certificate and would not.
If you genuinely suspect your battery is in poor condition, a certificate is not a marketing tool for you. It is still worth having, because you will find out what you are actually selling and can price it deliberately rather than have a buyer discover it.
And it says nothing about the rest of the car. It is a battery assessment, not a roadworthy and not a pre-purchase inspection.
What you get
The measured State of Health and the Battery Grade
Cell voltage spread, temperature behaviour and any stored fault codes
A five-year projection and the distance to the 70% warranty floor
A numbered certificate with a QR code and a public verification page
Ready-to-paste listing text with the figures and the verification link, plus a badge image sized for the major marketplaces
$249, we come to the car, and the report is produced at the appointment.
What your certificate says, and what it can't · Verify a certificate · Book a test — $249