What repair workshops need before battery passports start

From 18 February 2027, some of the battery packs that independent workshops repair or refurbish will have to sit within the EU battery passport system. That matters well beyond new battery sales. If you handle e-bike packs, e-scooter packs, larger industrial lithium batteries, or EV batteries, you need to know whether the battery in front of you is in scope, what kind of work you have actually carried out in legal terms, and what evidence you will need to keep.

For repairers, the practical issue is not only creating or updating records. It is making sure the workshop can prove what happened to a battery, who authorised access to data, which tests were done, and whether the result was a repair, preparation for re-use, repurposing, or remanufacturing. That distinction affects whether the existing passport continues, or whether a new passport linked to the original one is required. If you are building processes now, our guides on EU battery passport deadlines and what to do now and what data a battery passport needs are useful starting points.

The key date is 18 February 2027. From that date, battery passports become mandatory for three groups of batteries placed on the market or put into service in the EU:

• electric vehicle batteries
• LMT batteries
• industrial batteries with a capacity above 2 kWh

For repair workshops, LMT is often the category that needs the closest attention. LMT means light means of transport, which covers batteries used in vehicles such as e-bikes and e-scooters. If your workshop repairs lithium packs from those products, you should assume that some of the batteries you handle will fall into the passport regime and verify that case by case.

Industrial batteries above 2 kWh also matter, especially where a workshop works on larger traction packs, commercial equipment, energy storage modules, floor care machines, material handling equipment, or other non-road applications. The legal category is not decided by what the workshop calls the battery. It depends on the regulation’s definitions and on the battery’s actual use and technical characteristics.

EV batteries are the clearest category in most cases, but even there, workshops should not rely on assumptions if the battery has been removed, rebuilt, or diverted into another use. Once a pack has had a complicated life, the classification question can stop being obvious.

Power tool batteries are where readers often need a caution. Many lithium packs used in power tools will not be LMT batteries. Some may be portable batteries rather than LMT, industrial, or EV batteries. That does not make them irrelevant to workshop record keeping, but it does mean you should not assume that every repaired lithium battery needs a passport from 18 February 2027. The workshop has to check the category of the pack it handles, not just the chemistry.

In practice, that means your intake process should capture enough information to classify the battery before work starts:

• product type and intended use
• original manufacturer and model
• nominal voltage and rated capacity
• energy in Wh or kWh
• whether the battery is from an e-bike, e-scooter, EV, industrial machine, or another product
• whether the pack is being returned to the same use or a different one

If there is doubt, stop and verify the legal category against Regulation (EU) 2023/1542. The cost of pausing a job is lower than building the wrong compliance trail.

Workshops use terms like repair, rebuild, refurbish, recondition, second life, and remanufacture quite loosely. The regulation does not. For battery passport purposes, the classification of the work matters.

At a practical level:

Repair usually means work intended to restore the battery so it can perform its original function again. That might include replacing a fuse, busbar, connector, sensor, harness, damaged enclosure part, or a failed BMS component, then testing the pack and returning it to service in the same application. Some cell or module replacement may still be treated as repair, depending on what was done and how the battery is characterised under the regulation and related rules.

Preparation for re-use is different. In practice, this is about checking, cleaning, testing, and carrying out the limited work needed so that a battery that has become waste can be used again for the same purpose without other pre-processing.

Repurposing means the battery is used for a different purpose from the one for which it was originally designed. A common example would be taking a traction battery or mobility battery and converting it for stationary storage.

Remanufacturing is more substantial. In workshop terms, this is closer to an industrial rebuild that returns a battery to as-new or specified performance through significant disassembly, replacement, reassembly, and validation.

Where the regulation says a battery that has been prepared for re-use, repurposed, or remanufactured requires a new passport, that new passport must be linked to the original passport. That link is important for traceability. It preserves the chain between the original battery identity and the battery’s later life stage.

The point where many workshops go wrong is assuming that any rebuild automatically becomes remanufacturing, or that any battery returned to use is just a repair. Neither assumption is safe. The legal result depends on what exactly was done, the battery’s status before the work, and the use after the work.

A sensible workshop process is:

1. Record the incoming condition and declared use.
2. Record whether the battery is waste, used product, warranty return, accident-damaged unit, or customer-owned service item.
3. Record every intervention, including whether cells, modules, BMS, housing, or safety-critical components were replaced.
4. Record the intended use after work.
5. If the classification is uncertain, check the regulation text before deciding whether the original passport continues or a new linked passport is needed.

This is also where a workshop should avoid marketing language in technical records. “Refurbished” is useful commercially, but it is too vague to support a legal compliance decision on its own.

Article 14 matters because workshops often need battery management system data to diagnose faults, assess state of health, and decide whether a battery is safe and economical to repair. The regulation gives the battery owner, or a third party acting on their behalf, the right to access certain battery data on a read-only basis, including state of health information held by the BMS.

For workshops, the practical meaning is straightforward. If we are acting for the owner, we should be able to obtain the owner’s authorisation and use that authority to access the relevant read-only data needed for diagnosis or assessment. That is not the same as unrestricted engineering access. It is a right of access to the specified data, on a read-only basis, for the owner or an authorised third party.

In day to day operations, that means workshops should tighten up three things.

First, customer authorisation. The job card should include a clear authority from the owner for us to access read-only battery data for diagnosis, repair assessment, safety testing, and record keeping. If the battery comes through a fleet operator, insurer, dealer, leasing company, or reseller, the paperwork should show that they are entitled to instruct us.

Second, data capture. We should record what data was accessed, when, from which battery, using which tool or interface, and under whose authority. If a dispute later arises about condition, warranty, or post-repair performance, that access log matters.

Third, limits. Article 14 is not a licence to alter BMS data, override safety locks, or rewrite history. Workshops should separate read-only diagnostic access from any programming, coding, or configuration work that may be governed by other rights, restrictions, or manufacturer controls.

State of health data is especially important because it informs repair decisions and later passport records. If the BMS reports a state of health figure, keep the raw value, the date, and the method by which it was obtained. If your own testing produces a different view of condition, keep both, and note why. A pack can show one state of health estimate at BMS level and another based on controlled capacity testing, especially if calibration is poor or the battery has been partly repaired.

If you are mapping workshop processes to compliance, our article on battery passport reporting rules businesses need to meet is useful for turning these access and record keeping duties into something operational.

A workshop that wants to support a battery passport for battery repair and refurbishment needs more than a pass or fail note. It needs a consistent technical record that explains the battery’s condition before work, after work, and at release. Workshops that offer lithium battery repair and refurbishment for e-scooter and power-tool packs often start with state of health, capacity and internal resistance checks at intake, which gives them a base to build on.

At minimum, the workshop should measure and record the following.

State of health

Record the state of health reported by the BMS, where available, and the state of health determined through workshop testing, where that is part of your process. State of health matters because it is one of the clearest indicators of remaining useful life and whether the battery is suitable for return to service, resale, or a different application.

Capacity

Record measured capacity, the test conditions, and whether the figure is gross, usable, or estimated. Capacity testing shows what the battery can actually deliver. Without it, “repaired” can mean almost anything. For e-bike and e-scooter packs, capacity is often the difference between a credible repair and a customer complaint a week later.

Internal resistance

Record pack-level internal resistance and, where your process allows, module or cell-group resistance. Rising resistance is a warning sign for heat generation, voltage sag, weak performance under load, and mismatch within the pack. It is also one of the best indicators that a battery may be unsafe to return to service even if open-circuit voltage looks acceptable.

Cell balance

Record voltage spread across cells or parallel groups at intake and after balancing or rebuild work. Cell balance matters because imbalance can point to ageing, self-discharge, hidden cell damage, or a failing BMS balancing function. A pack can look normal at rest and still have a dangerous imbalance under charge or discharge.

Those four items should sit inside a fuller job record. In practice, we recommend recording:

• unique battery identifier, serial number, and any passport identifier if one exists
• chemistry, nominal voltage, rated energy, and application
• owner details and authorisation for data access
• intake condition, including crash damage, water ingress, swelling, corrosion, or tamper evidence
• BMS fault codes and event logs, if accessible lawfully
• insulation or isolation checks where relevant to the battery type
• temperature observations during charge and discharge testing
• replaced parts, including cells, modules, BMS, fuses, sensors, connectors, and enclosure parts
• source and specification of replacement parts
• firmware or configuration details where changed
• final functional test result
• release decision, including any restrictions on use

Why this level of detail? Safety, traceability, and future updates.

Safety comes first. A battery returned to service without a robust record is harder to defend if there is a later thermal incident, charger compatibility issue, or sudden loss of performance.

Traceability matters because once passports become mandatory for in-scope batteries, later actors in the chain may need to understand what happened to the battery. If a passport needs to be updated or a new linked passport is required, vague workshop notes are not enough.

Future updates matter because condition data is not static. If a battery is repaired today and assessed again later, the workshop record may be the only reliable baseline showing whether degradation is normal or whether the earlier work introduced a problem.

A workshop is ready when it can classify the battery, justify the work category, access the right data lawfully, and produce records that another competent person could follow without guesswork.

Start with process. Can the workshop identify whether a battery is an LMT battery, an industrial battery above 2 kWh, an EV battery, or something outside the passport scope from 18 February 2027? If not, intake needs fixing before anything else.

Then check evidence. For every repaired or refurbished pack, can the workshop show:

• what battery it received
• what status the battery had on arrival
• what tests were carried out
• what data was read from the BMS
• what components were replaced
• what the battery’s condition was at release
• whether the outcome was repair, preparation for re-use, repurposing, or remanufacturing

Next, look at traceability. A good workshop can connect the customer job, the physical pack, the test files, the technician’s actions, and any passport record or passport update. If those records live in separate spreadsheets, handwritten notes, and bench instruments with no common ID, readiness is weak.

Technician workflow is the next test. Readiness is not a policy document in a folder. It is whether the technician on the bench has a job sheet that prompts the right checks, a way to capture measurements consistently, and a clear escalation route when the battery’s legal status is uncertain.

That escalation route is critical. The workshop should define stop points, such as:

• the battery category is unclear
• the battery may have become waste before arrival
• the work done may amount to repurposing or remanufacturing rather than repair
• the original passport exists but key identifying data is missing
• BMS access is requested without clear owner authority
• test results conflict, for example acceptable capacity but unsafe resistance or imbalance

At those points, the right action is not to guess. It is to stop, verify the regulation text, and document the basis for the decision. That is especially important because the legal effect can turn on facts that look minor in a workshop but are decisive in compliance terms.

If you are building or reviewing your internal approach, our guides on how to build a battery digital product passport and how to build a battery passport that stands up to scrutiny can help you turn workshop records into a system that is usable when the passport rules start to bite.

For independent repairers, the practical message is simple. Do not wait until February 2027 to work out whether your records are good enough. By then, the workshops that cope best will be the ones that already know which batteries they handle, what category of work they perform, what data they are entitled to read, and how to evidence every decision from intake to release.