Data carrier options beyond QR: data matrix, NFC and other carriers for a battery identifier

A data carrier is the physical means by which a machine readable identifier is attached to a battery. The Battery Regulation expects a QR code as the carrier for the battery passport, under Article 13(6) and Article 77. Other carriers exist, and other product passport frameworks contemplate them. The question for a battery record is not which carrier is newest or most capable. The question is which carrier carries the same identifier, resolves to the same record, and can be read by the readers who need it, in the conditions where they need it.

A carrier that carries a different identifier, or that resolves to a different record, is not an alternative carrier. It is a different record route, and it must be treated as such.

What carriers are in use for product identification?

QR codes, Data Matrix codes, linear barcodes, radio frequency identification tags, and near field communication tags are the carriers most often discussed for product identification. A QR code is a two dimensional symbol readable by phones and by industrial imagers, capable of encoding a URL that resolves to a record. A Data Matrix code is a smaller two dimensional symbol, widely used in industrial marking, readable by industrial imagers and by some phones, suited to small, curved or harsh surfaces. A linear barcode encodes a short identifier for point of sale and logistics, but cannot encode a URL in a form a phone can resolve without an application. A radio frequency tag can be read without line of sight and can carry more data, but requires a reader, raises cost and raises questions about durability, privacy and end of life handling. A near field communication tag can be read by a phone at close range and can carry a URL, but requires the tag to survive the battery life and the reading environment.

How do carriers compare on the battery test?

The battery test has four parts: readability by the intended readers, durability over battery life, cost and complexity at production scale, and consistency with the legal carrier requirement. QR codes score well on phone readability, which matters for public tier access, and on cost. Data Matrix scores well on small surfaces and industrial readability, which matters for cells and small packs, but less well on phone readability in general use. Radio frequency and near field tags score well on automated reading and on reading without line of sight, but poorly on cost, durability in harsh battery environments, and end of life separation. Linear barcodes score well on logistics, but poorly as a passport route, because a phone cannot resolve a linear code to a record without additional infrastructure. The comparison must be made for the specific battery, surface and reader set, not in general. A carrier that works for a large stationary battery may fail for a small LMT battery, and the reverse.

Can more than one carrier be used for one battery?

More than one carrier can be used where each carrier encodes the same identifier and resolves to the same record. A battery can carry a QR code for public and workshop reading and a Data Matrix code for industrial marking, provided both codes carry the same unique identifier and the same resolution route. Dual carriers increase robustness: if one code is damaged, the other may still read. Dual carriers also increase risk: if the two codes carry different identifiers, or if one code is updated and the other is not, the battery appears to have two identities. The control is single sourcing: one identifier, one record, two encodings, with a check that both encodings resolve to the same record before the battery is placed on the market. A dual carrier arrangement without that check is a liability, not a redundancy.

What does the carrier comparison table show?

What does ESPR add to the carrier question?

Regulation (EU) 2024/1781 establishes a digital product passport framework for products in general, with data carriers to be specified in delegated acts for each product group. For batteries, the Battery Regulation is the sector law that governs, and its QR code requirement takes precedence for the battery passport. ESPR is framework context, not an alternative carrier rule for batteries. A reader who imports an ESPR carrier option into a battery record without checking the Battery Regulation text risks building a record route that does not meet Article 13(6). The frameworks converge on the same principle, one identifier, one record, tiered access, and they diverge on the specific carrier and content rules for each product group. The battery record follows the battery rules.

What limits apply to carrier claims?

A carrier claim states how an identifier can be read. It does not state that the record behind the identifier is complete, current or accurate. A perfectly printed code that resolves to an incomplete record is a good carrier for a poor record. Carrier testing and record checking are separate controls, and both must pass. This guide gives general educational information only and does not give legal advice for a particular battery, carrier or system.