EU Battery Regulation 2023/1542: What Battery OEMs Need to Know

The EU Battery Regulation (EU) 2023/1542 introduces requirements for battery sustainability, safety, performance, labelling and end-of-life management. For OEM companies sourcing custom batteries from external manufacturers, understanding these requirements is an important part of preparing products for the European market.

Outsourcing battery production does not automatically transfer regulatory responsibilities to the manufacturing partner. Companies placing batteries on the EU market need to understand their legal roles, identify applicable requirements and obtain the technical information needed to support compliance.

This guide explains how the regulation affects battery OEM projects, what documentation customers should obtain from suppliers, and how to prepare custom battery products for the European market.

What Is the EU Battery Regulation 2023/1542?

Regulation (EU) 2023/1542 establishes a framework for managing the environmental and safety impacts of batteries throughout their lifecycle. It entered into force in August 2023 and has generally applied since 18 February 2024.

The regulation covers all major battery categories, regardless of chemistry, design or intended use:

• Portable batteries
• Starting, lighting and ignition (SLI) batteries
• Light means of transport (LMT) batteries
• Electric vehicle (EV) batteries
• Industrial batteries

It applies to batteries placed on the EU market or put into service, including products manufactured outside the EU and batteries incorporated into other products.

For OEM businesses, this means that sourcing batteries from an overseas manufacturer does not exempt the finished battery from applicable EU requirements. However, the specific obligations depend on the battery category, capacity, intended application and relevant implementation dates.

Who Is Responsible for Battery Compliance in OEM Projects?

Understanding the legal responsibilities of each company in the supply chain is essential when outsourcing battery manufacturing. Commercial OEM arrangements and the legal definition of a manufacturer under the EU Battery Regulation are not necessarily the same.

Battery Manufacturer vs. OEM Brand Owner

Under Article 3 of Regulation (EU) 2023/1542, a manufacturer is a natural or legal person who manufactures a battery, or has a battery designed or manufactured, and markets it under their own name or trademark.

This definition is particularly relevant to businesses using OEM/ODM manufacturing arrangements.

For example, a European equipment company may commission an overseas battery supplier to develop a custom LiFePO4 battery pack. If the European company has the battery manufactured and places it on the EU market under its own name or trademark, it may qualify as the legal manufacturer under the regulation.

Other economic operators also have specific responsibilities:

• Contract battery manufacturer: Produces cells, modules or battery packs according to agreed specifications and provides relevant technical information and manufacturing support.
• Manufacturer or brand owner: May be responsible for manufacturer obligations when it meets the legal definition under the regulation.
• Importer: Places a battery from a third country on the EU market and must perform the applicable verification and compliance duties.
• Distributor: Makes batteries available on the market and must fulfil the relevant verification and handling obligations.

An importer or distributor may also be considered a manufacturer under Article 44 when it markets a battery under its own name or trademark, or modifies a battery in a way that may affect its compliance.

Does Outsourcing Battery Production Transfer Regulatory Responsibility?

No. Outsourcing production does not automatically transfer the legal obligations of the company considered the manufacturer under the regulation.

Under Article 38, the responsible manufacturer must ensure that applicable requirements are met, carry out the required conformity assessment, prepare technical documentation, issue an EU Declaration of Conformity where required and ensure appropriate CE marking.

Battery suppliers also have an important role. Article 39 establishes specific obligations for suppliers of battery cells and battery modules to provide relevant information and documentation needed by battery manufacturers to demonstrate conformity.

For OEM customers, this makes supplier cooperation essential. Before starting a custom battery project, both parties should clarify responsibilities for product specifications, testing, documentation, production changes and technical support.

Key EU Battery Regulation Requirements for OEM Batteries

The regulation introduces requirements covering battery safety, performance, sustainability, labelling and digital information. OEM companies should identify the provisions applicable to their specific battery category rather than assume that all lithium batteries follow the same requirements.

1. Battery Safety and Performance Requirements

Battery safety and performance are central to the EU regulatory framework. Article 6 establishes restrictions on specified hazardous substances, while Article 10 introduces performance and durability requirements for rechargeable industrial batteries with a capacity greater than 2 kWh, LMT batteries and EV batteries.

Article 12 also addresses safety requirements for stationary battery energy storage systems, including protection against relevant risks such as fire.

For OEM customers developing custom battery packs, these requirements make early technical planning important. Key design considerations may include:

• Cell chemistry and battery configuration
• Voltage, capacity and charge/discharge characteristics
• Battery management system (BMS) functions
• Overcharge, over-discharge and overcurrent protection
• Operating temperature and thermal management
• Mechanical protection and enclosure design

For example, a LiFePO4 battery designed for a UPS system may require different electrical configurations, protection settings and communication functions from a battery developed for industrial machinery.

The applicable safety and performance requirements should therefore be determined according to the finished battery's classification and intended application.

2. Substance Restrictions and Sustainability Requirements

The regulation also introduces requirements intended to reduce the environmental impact of battery production and improve material recovery.

Restricted substances: Article 6 establishes restrictions on specified substances, including mercury, cadmium and lead, subject to applicable limits and exemptions. OEM companies should obtain relevant material information from their battery suppliers to support substance compliance assessments.

Carbon footprint: Article 7 introduces carbon footprint requirements for specified battery categories. For rechargeable industrial batteries with a capacity greater than 2 kWh, except those with exclusively external storage, the regulation establishes separate stages for the carbon footprint declaration, performance class and maximum carbon footprint threshold.

The statutory dates are 18 February 2026 for the declaration, 18 August 2027 for the performance class and 18 February 2029 for the maximum threshold. Each date is subject to the relevant delegated or implementing act provisions, including the applicable 18-month timing rule. Industrial batteries with exclusively external storage have separate, later timelines.

Recycled content: Article 8 introduces documentation requirements for specified battery categories. From 18 August 2028, or 24 months after the relevant delegated act enters into force, whichever is later, qualifying industrial batteries with a capacity greater than 2 kWh, EV batteries and certain SLI batteries must be accompanied by documentation showing the applicable recovered material shares.

The corresponding documentation requirement for qualifying LMT batteries applies from 18 August 2033. Separate minimum recycled content thresholds apply from 2031 for specified categories and from 2036 for additional categories. These reporting and minimum-content requirements should not be treated as the same obligation.

For OEM customers, material traceability and access to reliable supplier data are important when preparing for these requirements.

3. Labelling, CE Marking and Traceability

Article 13 establishes battery labelling and marking requirements covering identification, manufacturer information, capacity and other applicable product information.

Depending on the battery category and implementation dates, requirements may include:

• Battery identification and model information
• Manufacturer contact details
• Relevant capacity and performance information
• Separate collection and waste battery symbols
• QR code information

CE marking is another important part of the regulatory framework. Under Articles 17–20, the responsible manufacturer must follow the applicable conformity assessment procedure, prepare the EU Declaration of Conformity and affix CE marking where required.

CE marking should not be confused with a general product quality certificate. It indicates that the product has undergone the applicable conformity assessment and meets the relevant EU requirements.

For OEM customers, consistent product identification, technical records and production traceability help support this process.

4. Battery Passport and Digital Information Requirements

Under Article 77, from 18 February 2027, each EV battery, LMT battery and industrial battery with a capacity greater than 2 kWh placed on the EU market or put into service must have a Battery Passport.

The Battery Passport applies to the finished battery. It does not automatically require a separate passport for every individual cell or module supplied as a component.

The passport provides access to information about the battery's identity, technical characteristics, performance, durability and other applicable data. The exact information depends on battery category and the relevant regulatory provisions.

Not all passport data fields become mandatory in February 2027. The European Commission's guidance, updated on 19 October 2026, identifies 71 data points and distinguishes between information that is mandatory, optional, applicable only in specific circumstances, or not required as of February 2027.

Carbon footprint, recycled content and due diligence information follow their own implementation timelines. They should not be treated as universally mandatory Battery Passport fields from February 2027.

The economic operator placing the finished battery on the EU market remains responsible for creating and maintaining its Battery Passport. Practical tasks may be delegated to another operator through written authorization, but this does not automatically transfer the legal responsibility.

For OEM businesses, discussing technical data availability, product identification and traceability with battery suppliers during product development can help prepare for these requirements.

What Documents Should OEMs Request from Battery Suppliers?

A battery supplier's ability to provide accurate technical information is an important consideration when developing products for the European market. OEM customers should establish a documentation list based on the battery category, applicable requirements and responsibilities agreed between the parties.

Not every item must be issued as a separate document by the battery factory. Some documents, particularly the EU Declaration of Conformity and complete regulatory technical documentation, are the responsibility of the legally responsible manufacturer.

However, the OEM customer should confirm that the battery supplier can provide the supporting technical information needed to prepare and maintain those records.

Test reports and certifications should also be checked against the exact battery model, configuration and intended application. Evidence for a different cell, module or battery pack may not be sufficient for the finished product.

How to Prepare a Custom Battery Project for EU Compliance

Regulatory considerations should be incorporated into custom battery development from the beginning rather than addressed only after production is complete. A structured process helps OEM companies identify technical and documentation requirements before finalizing the battery design.

1. Define the Battery Application and Classification

Identify the battery's intended use and regulatory category. Batteries developed for UPS equipment, industrial machinery and stationary energy storage systems may fall under different requirements depending on their characteristics and application.

Also determine whether the battery will be marketed independently or incorporated into another product. This helps establish the relevant regulatory obligations and responsible economic operators.

2. Translate Requirements into Product Specifications

Once the application and classification are established, translate the relevant requirements into design and validation criteria. These may include electrical performance, BMS functions, protection mechanisms, operating conditions, traceability and applicable testing.

For custom projects, the OEM customer and manufacturer should agree on the required specifications before prototype development begins.

3. Agree on Testing and Documentation Responsibilities

Confirm which party will arrange testing, maintain technical records, provide supporting product information and manage design changes. Changes to cell models, battery configurations, BMS parameters or manufacturing processes may require additional technical evaluation or testing.

Documenting these responsibilities early helps prevent missing information or unexpected validation work later in the project.

4. Complete Applicable Conformity Assessment Before Market Placement

Before the battery is placed on the EU market or put into service, the legally responsible manufacturer must complete the applicable conformity assessment process, prepare the required technical documentation and ensure relevant labelling and marking requirements are met.

Other obligations, including producer registration and extended producer responsibility, should also be reviewed according to the company's role and the relevant EU Member State requirements.

How to Choose an OEM/ODM Battery Manufacturer for the European Market

For European OEM businesses, selecting a battery supplier involves more than comparing unit prices and product specifications. A manufacturing partner should be able to support the battery's intended application, maintain consistent production and provide the technical information needed throughout product development.

Custom Battery Design and Engineering

Evaluate whether the manufacturer can customize voltage, capacity, dimensions, cell configuration, enclosure design and electrical interfaces according to the end product's requirements.

For projects involving non-standard battery configurations or equipment integration, working with a partner experienced in custom battery and energy storage solutions can help align product design with manufacturing requirements.

BMS Development and System Integration

The BMS must support the battery's monitoring, protection and communication requirements. For UPS and industrial applications, check whether the supplier can configure communication protocols, protection parameters and interfaces compatible with the end equipment.

For example, BMS integration in custom UPS battery systems may involve CAN, RS485, Modbus or proprietary communication protocols, depending on the UPS platform.

Testing and Quality Control

Ask whether the manufacturer can support relevant electrical, thermal, mechanical and protection testing for the intended battery configuration.

Where certifications or test reports are available, confirm the product models, configurations and standards covered. Testing requirements should be determined according to the application and target market rather than assumed to be identical for all battery products.

Production Consistency and Traceability

For OEM customers sourcing batteries over an extended period, consistent manufacturing is essential. Evaluate the supplier's production controls, component traceability, batch identification and change management procedures.

These capabilities also help maintain accurate product information and supporting technical records.

Technical Documentation and Project Support

A suitable manufacturing partner should be able to provide accurate product specifications, relevant test evidence, material information and technical details required by the responsible manufacturer.

ACE Battery provides OEM/ODM lithium battery and energy storage solutions for application-specific requirements. Its customization capabilities include battery configuration, capacity, voltage, dimensions and BMS integration, supported by R&D and quality testing.

For UPS applications, ACE offers lithium UPS battery solutions with different voltage and capacity configurations, scalable system options and BMS communication capabilities.

Testing and certification requirements can be discussed according to the customer's battery design, intended application and target market. This allows the relevant testing scope to be considered during product development rather than after the battery design has been finalized.

Frequently Asked Questions

Does Every Industrial Battery Need a Battery Passport?

No. From 18 February 2027, the Battery Passport requirement applies to industrial batteries with a capacity greater than 2 kWh, as well as EV and LMT batteries. Other industrial batteries are not automatically subject to this requirement.

Can a Battery Supplier Create or Update a Battery Passport on Behalf of an OEM?

Yes. The economic operator placing the finished battery on the EU market may delegate practical Battery Passport creation or updating tasks to another operator through written authorization. However, delegation does not automatically transfer the legal responsibility of the responsible economic operator.

Does CE Marking Alone Mean a Battery Is Fully Compliant with EU Battery Regulation?

No. CE marking indicates that the applicable conformity assessment requirements have been met. It does not replace other obligations under the regulation, such as applicable sustainability, labelling, documentation, traceability and end-of-life requirements.

References

1. Regulation (EU) 2023/1542 – Consolidated Text, EUR-Lex
2. Batteries – Digital Product Passport, European Commission
3. EU Digital Product Passport FAQ for Batteries – European Commission
4. Guidance to Support Preparations for the Digital Batteries Passport – European Commission