Chapter VII of Regulation (EU) 2023/1542 sets out a supply chain due diligence obligation modelled on the OECD framework. Six parts of it decide how much work you have in front of you.
Short answer
Battery due diligence under the EU Battery Regulation applies from 18 August 2027. If you place batteries on the EU market and you are above the turnover threshold, you need a documented due diligence policy covering cobalt, natural graphite, lithium and nickel, a mapped supply chain, a risk assessment against the categories in Annex X, a mitigation plan, third-party verification by a notified body, and public reporting. The date is when verification must already be complete, not when the work starts.
A documented policy, not a statement of intent
Article 48 requires economic operators to adopt and operate a due diligence policy for batteries, structured around the OECD framework: a management system, risk identification, risk response, verification and reporting.
A supplier code of conduct on a website does not meet this. The policy has to name responsibilities, describe how decisions are made when a risk is found, and be capable of being audited against.
Supply chain mapping past tier one
You need to know the origin of cobalt, natural graphite, lithium and nickel, and the chemical compounds containing them, through the chain of custody: mine, processor, refiner, cell producer.
Most companies have visibility to tier two and no further. That gap is the single largest reason the obligation was postponed, and closing it takes longer than any other part of the work.
Risk assessment against defined categories
The Regulation sets out the social and environmental risk categories that the assessment has to cover, spanning human rights, labour conditions, community impacts and environmental harm in Annex X.
The assessment is against those categories specifically. A general ESG screening built for another framework will not map cleanly onto them.
Third-party verification by a notified body
Verification is not a self-declaration. A notified body has to verify the due diligence policy, and slow designation of those bodies across Member States was one of the reasons cited for the two-year delay.
Verification capacity is finite. Operators who leave this to 2027 will be competing for slots with everyone else who did the same.
Public reporting and record keeping
Operators must review their due diligence policy and make a report publicly available. Under the rules currently in force this is annual, though a proposed amendment would move it to every three years.
Documentation supporting the policy has to be retained for at least ten years, which means the record system needs to be designed for that from the start rather than reconstructed later.
How it connects to the battery passport
The battery passport under Article 77 applies from 18 February 2027, ahead of the due diligence date, and covers EV batteries, LMT batteries and industrial batteries above 2 kWh.
The two obligations draw on the same upstream data. Building traceability once, for both, is considerably cheaper than building it twice.