The world is in the midst of an unprecedented energy transformation. Internal combustion engines are giving way to electric vehicles (EVs), and fossil fuels are being replaced by renewable energy sources whose output has to be stored. At the heart of this revolution stands one critical component: the battery.

But while batteries are the solution to the carbon-emissions problem in transport and energy, they themselves carry serious environmental and social challenges. From the mining of rare metals to their complex recycling, the life cycle of a battery is far from "green" by default.

This is precisely where the Digital Product Passport for batteries enters the stage. The European Union has recognised that for the transition to be truly sustainable, we need full transparency.

The new EU Battery Regulation, which forms part of the broader ecodesign framework, positions batteries as the outright pioneers in the implementation of digital passports. From February 2027, every industrial battery and every battery for electric vehicles with a capacity above 2 kWh placed on the European market will have to carry its own "electronic identity document".

In this article we take an in-depth look at why batteries are the first major test case for the DPP, what information these passports will contain, and how they will completely transform the industry - from the mines to the recycling plants.

Why are batteries the "patient zero" of digital passports?

The European Commission's choice to begin the mass rollout of the DPP with batteries is no accident. It is driven by the immense strategic, economic and environmental importance of this product for the continent's future.

First comes the question of critical raw materials. Lithium-ion batteries rely on materials such as lithium, cobalt, nickel and manganese.

The mining of these resources often takes place in developing countries where environmental protection standards are lax, and in some regions, such as the Democratic Republic of the Congo, there are serious problems with human rights and child labour. Europe wants to make sure that the batteries powering its green transition are not the product of exploitation or environmental disasters in other parts of the world.

Second comes the issue of recycling.

An EV battery weighs hundreds of kilograms and contains complex chemistry. When its life is over, it cannot simply be dumped in a landfill - this is both extremely dangerous (due to the risk of fires and toxic contamination) and economically unsound, since it contains valuable metals that can be reused. Until now, recycling companies often worked "blind", with no knowledge of the exact chemical composition of the battery they were processing. The Digital Product Passport will change this forever.

Anatomy of the Battery Passport

The Battery Passport will not be just a static PDF document or a label. It will be a dynamic digital record accessible by scanning a QR code physically affixed to the battery itself. The information it contains will be structured to serve different needs and audiences.

To get a clear sense of the scale of data that will be required, we can break it down into several main categories:

General information and technical specifications

This is the battery's basic "business card". It will include the manufacturer's name, the geographical location of the plant, the date of production, the weight, and technical parameters such as nominal capacity, operating voltage and the chemical composition of the cells.

Carbon footprint

This is perhaps the most important environmental metric. The passport will have to show how much CO2 has been emitted across the battery's entire life cycle - from ore extraction, through the transport of materials, to the energy spent producing the cells themselves. This will prevent manufacturers from relocating their dirty production to countries with cheap coal-based electricity, since a high carbon footprint will make them uncompetitive or even illegal on the European market.

Supply-chain traceability

To guarantee ethical origin, the passport will include due-diligence reports. These will prove that the manufacturer has traced the path of cobalt, lithium, nickel and graphite all the way back to the mines themselves and verified that labour and human rights are respected there, and that no armed conflicts are being financed.

State of health and operation

Unlike many other products, a battery changes over time. The DPP for batteries will be dynamic in this respect. It will connect to the vehicle's Battery Management System (BMS) and will be able to provide up-to-date information on its "health" - how many charge and discharge cycles it has been through, what its remaining capacity is compared with the original, and whether it has experienced extreme temperature stress.

Instructions for recycling and "second life"

This section is designed specifically for the engineers at recycling plants. It will contain detailed diagrams for safe disassembly, information on potentially hazardous substances inside, and instructions on how to extract the valuable metals most efficiently.

The life cycle through the lens of the DPP for batteries

One of the most exciting innovations that the Digital Product Passport will catalyse is the development of the market for the "second life" of batteries.

When an EV battery falls below 70-80% of its original capacity, it is no longer suitable for the vehicle, because its range drops drastically.

Even so, this battery still has enormous capacity for storing energy. Instead of being recycled immediately (which itself requires a great deal of energy), it can be reprogrammed and used for stationary energy storage - for example, to store electricity from solar panels in a household setting, or to help balance the electrical grid.

Until now, this process has been extremely difficult. Companies wanting to give old EV batteries a second life had to test them one by one over the course of days in order to understand their condition, because they had no access to their history. With the arrival of the DPP, all the necessary information will be available in seconds by scanning the code.

This will dramatically reduce assessment costs and create an entirely new, profitable industry around reuse. The passport will be updated to reflect that the battery has entered its "second life", preserving its traceability all the way to final recycling.

Who benefits from the introduction of the Battery Passport?

Rolling out such a large-scale system requires effort from every player in the market, but the benefits are spread across the entire chain.

• End consumers: When buying a used electric vehicle, the biggest risk is the condition of the battery, because it is the most expensive component. With the DPP, buyers will have an independent, cryptographically secured certificate showing how much "life" is left in it, which will make the second-hand car market far more secure and transparent. Beyond that, consumers will know that they are not financing environmental damage.
• The recycling industry: As already mentioned, recycling plants will receive an "X-ray" of every product that arrives at them. This means safer working conditions and higher efficiency in metal recovery, which boosts their profitability.
• Manufacturers: Despite the initial implementation costs, automotive companies will gain unparalleled control over their own supply chains. They will be able to identify bottlenecks, optimise their logistics and build stronger trust in their brand by backing up their environmental claims with real data rather than marketing tricks.

What the challenges will be

So far, the concept sounds perfect, but the practical execution of the DPP for batteries is a colossal technological and administrative challenge. The industry has very little time before 2027 to solve several critical problems.

Collecting data from fragmented global chains

European manufacturers are often at the end of the chain. The ore is mined in South America or Africa, refined in Asia, the cells are assembled in China or South Korea, and only then do they arrive in Europe. How will a European automotive giant get a small refinery on another continent to provide accurate, digitised and verified data on its carbon footprint? This requires the creation of global standards for data exchange, which are only now being developed by consortia such as the Global Battery Alliance.

Balancing transparency and trade secrets

This is perhaps the most contested question. Battery technologies are advancing at breakneck speed, and the chemical composition of cells is one of the most closely guarded secrets of companies like Tesla, Panasonic or CATL. Legislators and technologists must find a way for the passport to provide enough information to recycling firms and regulators without exposing intellectual property to competitors. The solution will likely involve granular access - different authorisation levels unlocking different layers of data in the passport.

The complexity of measurement

Calculating the carbon footprint is not an exact science. Different companies use different methodologies. For the DPP to work, the European Commission has to create strict, unified rules for how exactly each value is measured and reported, in order to avoid manipulation and unfair competition.

How should businesses prepare?

For companies that manufacture, import or integrate batteries into their products, the clock is ticking. Putting off DPP preparation is no longer an option. The first step is to carry out a full audit of the current supply chain and identify the "blind spots" in the data.

Businesses need to start investing in software solutions for traceability and to open a dialogue with their tier-one, tier-two and tier-three suppliers. Supplier contracts will have to be rewritten, with data sharing for product-passport purposes turned into a mandatory clause of any partnership.

The sooner a company digitises its processes and automates the collection of environmental data, the greater the competitive advantage it will have once the regulations enter into force.

Conclusion

The Digital Product Passport for batteries is not just another bureaucratic obstacle introduced by Brussels. It is a fundamental shift in the paradigm of manufacturing. It transforms the battery from a closed "black box" into a transparent, traceable asset with a clearly measurable impact on the planet.

The success of this pilot project will shape the future of the digital passport concept as a whole. If Europe manages to impose this standard on one of the most complex products of our time, it will be categorical proof that the circular economy is not just a utopian dream, but an entirely achievable technological reality.

Batteries will pave the way, and after them will inevitably come textiles, electronics, construction materials and, ultimately, almost every product we use in our daily lives.