As organisations prepare for the EU Battery Passport, much of the discussion has focused on compliance deadlines and Digital Product Passport infrastructure. However, another resource is becoming increasingly important for implementation teams: the Battery Passport Data Attribute Longlist v1.3.
Published by the Battery Pass consortium in March 2026, Version 1.3 provides a structured catalogue of data attributes that organisations can use when developing Battery Passport solutions. While it is not a legal requirement, it reflects the latest technical thinking, incorporates updates from European standardisation activities, and aligns with the evolving regulatory framework under the EU Battery Regulation and Ecodesign for Sustainable Products Regulation (ESPR). It serves as a practical implementation guide that helps organisations understand what information a Battery Passport should contain and how that information can be structured. (Battery Pass)
For manufacturers, battery developers, software providers and supply chain partners, the question is no longer whether data matters. The more useful question is which data fields deserve attention today, especially as standards and implementing acts continue to evolve.
What Is the Battery Passport Data Attribute Longlist v1.3?
The Data Attribute Longlist is a technical reference document that expands on the Battery Passport requirements established under Regulation (EU) 2023/1542.
Rather than replacing the Regulation, it translates legal requirements into practical data structures. It identifies potential data attributes, describes their intended purpose and supports a more consistent approach to Battery Passport implementation across the battery value chain.
Version 1.3 builds upon DIN DKE SPEC 99100, incorporates developments from CEN-CENELEC JTC 24 standardisation work, and reflects feedback gathered from industry stakeholders. As the regulatory landscape continues to mature, the Longlist is expected to evolve alongside new delegated acts, implementing acts and harmonised standards. (Battery Pass)
If you are unfamiliar with the technical foundation behind these data fields, we recommend reading BASE's article "DIN DKE SPEC 99100 Explained: The Technical Standard Behind Battery Passport Data Fields." It explains how the underlying specification structures Battery Passport information and why it has become an important reference for implementation.
Which Data Fields Matter Most Right Now?
The Longlist contains a comprehensive collection of attributes, but organisations do not need to treat every field with the same level of urgency. Several categories deserve immediate attention because they form the foundation of an effective Digital Battery Passport.
Product Identification
Every Battery Passport begins with reliable identification.
Attributes such as the unique battery identifier, manufacturer details, battery model, manufacturing information and product categorisation establish the identity of the battery throughout its lifecycle. Accurate identification also supports interoperability with the EU's Digital Product Passport Registry and enables stakeholders to retrieve the correct passport through the associated data carrier.
Without consistent product identification, the remaining information becomes difficult to interpret or verify.
Technical Characteristics And Performance
Technical information forms the core of a Battery Passport.
The Longlist includes attributes describing battery chemistry, capacity, voltage, performance characteristics and other technical specifications that help downstream users understand how a battery was designed and how it should be used.
As batteries progress through their operational life, additional information relating to performance, durability and state of health becomes increasingly valuable for maintenance, second-life applications and recycling.
These attributes also support several requirements introduced under the EU Battery Regulation for industrial, electric vehicle and light means of transport batteries. (EUR-Lex)
Sustainability And Carbon Footprint
One of the principal objectives of the Battery Passport is to improve transparency regarding environmental performance.
The Longlist therefore includes attributes relating to lifecycle carbon footprint, recycled content and other sustainability indicators that support the EU's broader circular economy ambitions.
Many organisations already collect environmental information for reporting purposes. Aligning this data with Battery Passport structures can reduce duplication while improving consistency across different sustainability initiatives.
Materials And Supply Chain Information
Supply chain transparency continues to receive increasing attention across Europe.
The Longlist contains attributes relating to battery composition, critical raw materials and responsible sourcing. These fields help organisations strengthen traceability, support due diligence requirements, and provide greater visibility across increasingly complex global supply chains.
As supply chain reporting obligations continue to develop, organisations that establish reliable data collection processes today are likely to find future compliance considerably easier.
Circularity And End-Of-Life Information
A Battery Passport should continue to provide value after a battery leaves service.
The Longlist therefore includes information that can support dismantling, repair, repurposing, remanufacturing and recycling activities. These attributes contribute to safer handling, improved material recovery and more efficient circular business models.
Providing accurate end-of-life information also supports the wider objectives of the EU Battery Regulation, which seeks to improve resource efficiency across the battery lifecycle.
Why Not Every Field Needs Immediate Implementation
One of the strengths of the Longlist is its breadth. However, that does not mean organisations should attempt to implement every possible attribute immediately.
The document is intentionally designed as a living implementation reference. Some attributes directly support regulatory requirements, while others anticipate future technical standards, evolving industry practices or optional use cases.
A practical implementation strategy often begins with mandatory regulatory data, expands to high-value operational information, and then gradually incorporates additional attributes as systems, suppliers and standards mature.
This staged approach can reduce implementation complexity while creating a stronger foundation for future updates.
Standards Continue To Evolve
The publication of Version 1.3 also highlights an important reality: Battery Passport implementation is still evolving.
European standardisation work continues through CEN-CENELEC JTC 24, which is developing harmonised standards supporting Digital Product Passports across different product groups. As these standards mature, guidance documents such as the Longlist will continue to evolve alongside them.
For readers interested in understanding how these standards fit together, BASE's article "JTC 24 Standards Explained For Battery Passport Teams: What They Mean In Practice" provides a practical overview of the current standardisation landscape and what it means for implementation teams.
Following these developments helps organisations make informed decisions about technology and data management without constantly redesigning their Battery Passport architecture.
Why This Matters For BASE
The BASE project is working to develop and validate interoperable Digital Battery Passport solutions that support secure data exchange, traceability and lifecycle transparency across the battery value chain.
Resources such as the Data Attribute Longlist v1.3 provide valuable implementation guidance by translating regulatory requirements into practical data structures. Combined with technical specifications such as DIN DKE SPEC 99100 and the ongoing work of CEN-CENELEC JTC 24, they contribute to a more consistent and interoperable Battery Passport ecosystem.
By testing and demonstrating Digital Battery Passport solutions in real-world scenarios, BASE helps bridge the gap between regulatory requirements, technical standards and practical implementation.
Looking Ahead
The Battery Passport Data Attribute Longlist v1.3 is more than a catalogue of technical fields. It provides organisations with a practical roadmap for preparing high-quality Battery Passport data while supporting interoperability and future regulatory alignment.
Rather than trying to collect every possible attribute immediately, organisations should focus on building reliable processes for the data that matters most today. Strong product identification, technical information, sustainability metrics, supply chain transparency and circularity data provide an excellent starting point.
As Battery Passport standards continue to develop, companies that establish robust data foundations now will be better positioned to adapt with confidence.
The BASE project has received funding from the Horizon Europe Framework Programme (HORIZON) Research and Innovation Actions under grant agreement No. 101157200.
References
- Battery Pass. "Now Published: Data Attribute Longlist v1.3.": https://thebatterypass.eu/news/now-published-data-attribute-longlist-v1-3/
- EUR-Lex - Regulation (EU) 2023/1542 Concerning Batteries and Waste Batteries:
https://eur-lex.europa.eu/eli/reg/2023/1542/oj - European Commission - Digital Product Passport for Batteries:
https://single-market-economy.ec.europa.eu/single-market/digital-product-passport/batteries_en - BASE Project - DIN DKE SPEC 99100 Explained: The Technical Standard Behind Battery Passport Data Fields: https://base-batterypassport.com/blog/technology-7/din-dke-spec-99100-explained-the-technical-standard-behind-battery-passport-data-fields-123
- BASE Project - JTC 24 Standards Explained For Battery Passport Teams: What They Mean In Practice: https://base-batterypassport.com/blog/regulations-4/jtc-24-standards-explained-for-battery-passport-teams-what-they-mean-in-practice-115