Share your car's battery health

Owner reports fill the gaps that published studies miss (older Leafs, i3s, Ioniq Electric…). We review every submission before it is used and only publish anonymised, aggregated figures.

How your report is used: we check it for plausibility, then use it in per-model statistics (e.g. median SoH by mileage). Once a model has enough reports we may also publish individual rows limited to: model, battery size, year, mileage, SoH, measurement method, country and charging type. We never publish your email, your notes text, the exact measurement date or any technical data (IP hash, browser). Published owner data is shared under our CC BY 4.0 open-data licence. Please don't include your name, registration plate or VIN in the notes. Full details: privacy policy.

Website Model* Year of first registration* Battery size (kWh or Ah)* Mileage* Unit State of health (SoH %)* How was SoH measured?* Measurement date* Country* Main charging Notes (optional) Email (optional – only if you're happy for us to ask a follow-up question) I confirm this is accurate to the best of my knowledge and is about a car I own or have had tested. I agree that UsedEVBattery may store this report and use and publish it in anonymised or aggregated form as described above and in the privacy policy. I can withdraw this by emailing hello@usedevbatteryhealth.com.

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We email (from alerts@usedevbatteryhealth.com) when new battery data is added. Low volume, no spam, unsubscribe any time. We'll first send a confirmation email – you're only subscribed once you click the link in it.

Emails are sent via MailerLite (EU). We never share your address. Every email has an unsubscribe link.