Used Battery Passport Continuity and What Carries Over After a Sale

A battery passport record continues after a sale only when the record itself remains linked to the same individual battery and later events are added to that record rather than starting a fresh record. Continuity is therefore a property of the record, not a property of the sale. A change of owner, a change of vehicle or a change of storage site does not by itself create a new battery, and the Regulation treats the passport as an electronic record for an individual battery, with information set out in Annex XIII, rather than as a document that is reissued at each transaction.

The term continuity is defined here as an unbroken chain from the first placing on the market to the present holder, in which identity, model information and later use information stay attached to one unique identifier. The scope is limited to batteries within the passport duty in Article 77, namely electric vehicle batteries, light means of transport batteries and industrial batteries with a capacity greater than 2 kWh, placed on the market or put into service from 18 February 2027. Batteries outside that scope may still carry records voluntarily, but continuity for those records is a matter of contract and practice, not of Article 77. The position is stated as checked on 28 October 2026.

What does continuity mean for a battery passport record?

Continuity means that the same unique identifier follows the same physical battery through each later stage, and that new information is appended under that identifier instead of being recorded under a different identifier. The record gains a history in sequence, so a later reader can see the starting identity, any recorded change of status and any later use information in order. A break in continuity occurs when the link between the battery and the identifier is lost, when a replacement record is created for the same battery, or when later events are stored only in a separate system that no later reader can reach from the passport. Each of those breaks weakens the record even when the battery itself remains serviceable.

Which parts of the record are expected to carry over?

Model level information carries over because the model does not change when ownership changes, including manufacturer identity, model identifier, category and chemistry as recorded at first placing on the market. Individual level information also carries over, including the unique battery identifier and recorded performance and durability information that describes that particular battery. Information resulting from use is added over time rather than replaced, so state of health information and status information such as original, repurposed or remanufactured remain readable as a sequence. Information that describes a particular holder or a particular installation is time bound, and a later reader needs the date attached to each entry to know which entry describes the present position and which describes a past position.

How does a change of owner affect the record?

A change of owner does not erase the earlier record, and the earlier entries remain part of the history of that battery. The practical question is whether the transfer is recorded in a way that a later reader can verify, with a date, an identity for the outgoing and incoming holder where the system requires it, and a statement of the battery condition at transfer where such a statement exists. Where no transfer entry is made, the record falls silent at the point of sale, and the next reader must rely on separate documents such as an invoice or a contract. Article 73 of the Regulation requires evidence of state of health evaluation and documentation of further use for certain waste batteries prepared for reuse or repurposing, and that documentation model shows why a silent transfer is a weaker form of continuity than a recorded one.

What does a continuity check look like in practice?

A continuity check compares the identifier on the battery, the identifier in the passport and the identifier in the accompanying documents, and then reads the dated entries in order to look for gaps. The check is a method, not a guarantee of condition, and a complete chain does not prove that a battery performs well. The table below sets out four checks and the record evidence that answers each check, using illustrative record states rather than a claim about any particular battery.

Why does continuity matter for reuse and repurposing?

Reuse and repurposing decisions depend on knowing what a battery has already done, because past use shapes the remaining capability that a later operator needs to assess. A continuous record lets a repurposer read the starting identity and the later history together, rather than treating the battery as an unknown unit that must be fully recharacterised from scratch. The Regulation supports that reading in Article 73, which requires a state of health record confirming capability for the intended later use and documentation of further use by invoice or contract for waste batteries subject to preparation for reuse or repurposing. Continuity does not replace testing, and a repurposer still needs its own evaluation, but a broken record removes a source of evidence that testing alone cannot restore.

What breaks continuity even when the battery is unchanged?

Continuity breaks when the identifier is changed, duplicated or lost, when the data carrier no longer resolves to the record, when later entries are kept only in a private system, or when a refurbishment is recorded as a new battery without a link to the earlier record. Each break has a different cause, from a damaged label to a change of record system, and each needs a different remedy. A damaged carrier is a marking problem that may be recoverable from documents, while a duplicated identifier is an identity problem that needs the record holder to resolve the duplication before the record can be relied on. The distinction matters because a buyer who treats every break as the same kind of failure may either reject a recoverable record or accept a record whose identity is genuinely in doubt.

What should a holder record at each transfer?

A holder should record the date of transfer, the identity of the parties where the system requires it, the identifier of the battery, the status at transfer and any state of health information available at that point, and should keep the invoice or contract that documents the transfer. The entry should be made under the existing identifier, with earlier entries preserved, so that the record reads as one history rather than as a set of disconnected snapshots. This guide gives general educational information only and is not individual legal advice. A holder with a specific transfer should check the Regulation text and any applicable national rules as checked on 28 October 2026 before acting.