Battery Passport Compared With a Certificate

A battery passport and a certificate are often confused because both are documents that support a claim about a battery, and because a passport file may contain references to certificates, test reports and declarations. The passport is a living electronic record for an individual battery, updated over life with information resulting from use, and split by access tier under Annex XIII. A certificate is a dated attestation, issued by a body or a manufacturer, stating that a model, a test or a process meets a stated requirement at a stated date. A reader who treats a certificate as a passport will miss the individual history, and a reader who treats a passport as a certificate will miss the attestation that the passport summarises but does not replace.

The scope is the distinction between record and attestation, as checked on 28 October 2026. The guide does not state the conformity assessment procedure for any category, and a reader should check the conformity chapter of the Regulation for the category in question.

What does a certificate attest?

A certificate attests that a stated subject, such as a battery model, a test result or a management system, met a stated requirement, at a stated date, under a stated method, as assessed by the issuer. The attestation is frozen at its date, and it does not update as the battery is used, repaired or repurposed, because the certificate describes the position at assessment, not the life that follows. A certificate should be read with its scope, its date, its method and its issuer, because a certificate for one model, one test or one site does not attest to a different model, a different test or a different site. The scope, date, method and issuer are the four elements that decide what a certificate proves, and a certificate read without them proves little.

What does a passport record?

A passport records the identity, the model facts and the individual history of a particular battery, with dated entries that accumulate over life, including state of health, status and later use information, under the access tiers in Annex XIII. The record is living, in the sense that later entries are added under the same identifier, with earlier entries preserved, so that the record at any date shows the history up to that date. A passport does not attest in the way that a certificate attests, because the passport is a record of facts and entries, not an attestation by a body that a requirement is met. The passport may reference certificates and test reports, and the authority tier contains test reports, but the reference is not the attestation itself, and the underlying certificate should be read where the attestation matters.

How do declarations fit the picture?

Declarations fit the picture as a third kind of document, in which the manufacturer declares that a battery model meets the Regulation requirements, in the EU declaration of conformity, with the technical documentation behind the declaration held by the manufacturer. The declaration is a manufacturer statement, the certificate is a body attestation where a body is involved, and the passport is the individual record that summarises the model and individual facts for later readers. The three documents serve different readers, with the declaration and the technical documentation serving authorities and the placing operator, the certificate serving the party who needs an independent attestation, and the passport serving every later holder, repairer and recycler who needs the history. A file that contains only one of the three is incomplete for a reader who needs another.

What does a record and attestation table look like?

A record and attestation table keeps the document, the subject and the life of the document apart. The table below states the positions in general terms.

What happens when a certificate and a passport disagree?

When a certificate and a passport disagree, whether in model, in test result or in date, the disagreement should be recorded and investigated, because the certificate describes the position at assessment while the passport describes the history, and a disagreement can arise from a model change, a test update, a record error or a certificate that covers a different scope. The investigation should compare the certificate scope, date and method with the passport entries, and should record the explanation, because a later reader who finds the disagreement without an explanation will not know which document to trust. A disagreement that is explained and recorded strengthens the file, while a disagreement that is ignored weakens both documents.

How should a reader use all three together?

A reader should use all three together by reading the passport for history, the declaration for the manufacturer statement of conformity, and the certificate for the independent attestation where one exists, and by recording the scope, date and method of each. The combined reading answers the history question, the conformity statement question and the attestation question separately, without merging them into a single conclusion that the battery complies. Compliance is a conclusion that needs the conformity assessment, the technical documentation and the market surveillance position, and a passport reading alone, however complete, does not prove compliance. The file should state the boundary between the reading and the compliance conclusion.

What limits apply to this distinction?

The limits are that conformity procedures turn on category and on the applicable modules, and this guide states them only in general terms. This guide gives general educational information only and is not individual legal advice. A reader with a specific battery should check the conformity chapter as checked on 28 October 2026 before acting.