Replaceable Batteries 2027 – EU Rules and Product Redesign | Lemontech

21 July 2026

Replaceable batteries from 2027: does your product need a redesign?

A battery hidden inside a sealed enclosure is still common in consumer electronics, IoT devices, wearables and professional equipment. From 18 February 2027, this approach will need to be checked more carefully. Article 11 of the EU Batteries Regulation introduces requirements for the removability and replaceability of portable batteries. For many products, the battery will need to be replaceable by the end user. Some product categories can use different rules, but they need to meet specific conditions. (Regulation (EU) 2023/1542 on batteries and waste batteries) For a product currently under development, this can affect much more than the battery itself. Enclosure design, battery mounting, PCB layout, connectors and firmware may all need to be considered before the design is frozen.

1. What changes for replaceable batteries from 18 February 2027?

From 18 February 2027, Article 11 of the EU Batteries Regulation starts to apply. The basic rule is that a portable battery incorporated into a product should be readily removable and replaceable by the end user. For the purpose of these rules, replacement should be possible without damaging the battery or the device, and the product should continue to operate without affecting its functionality, performance or safety. The requirement applies to the complete portable battery, rather than requiring individual cells inside the battery to be replaceable. The practical interpretation of these requirements is explained in the European Commission guidelines on the removability and replaceability of portable and LMT batteries.

What does “replaceable by the end user” mean?

It does not mean that every product needs a battery door that can be opened by hand. Commercially available tools can still be required. However, battery removal should not normally depend on proprietary tools, solvents or thermal energy. A specialised tool that is not generally available to consumers may be used if it is supplied free of charge with the product. For a product development team, this is the first point worth checking: can a normal user actually reach and replace the battery without damaging the product? If the answer is no, the next question is whether the product qualifies for one of the permitted derogations.

2. Which products are exempt from the EU replaceable battery rules?

Not every product containing a portable battery has to make that battery replaceable by the end user. The Batteries Regulation includes cases where replacement by an independent professional is sufficient. These include, under defined conditions, appliances specifically designed to operate primarily in environments regularly exposed to splashing water, water streams or immersion and intended to be washable or rinseable. The rules also provide specific treatment for professional medical imaging and radiotherapy equipment and in vitro diagnostic medical devices. A separate, full derogation can apply where continuous power and a permanent battery connection are necessary for the safety of the user or device. It can also apply, under specific conditions, where continuity is necessary to protect data integrity in products whose main function is collecting and supplying data.

New derogations proposed for wearables and other products

There is also an important recent development. On 14 July 2026, the European Commission adopted a delegated act adding further product categories to the derogations. These include certain wearable devices where user access to the battery could compromise safety, durability or water resistance, or where the device is too small for safe battery handling. The act also covers several other categories, including certain electric toys and equipment intended for explosive atmospheres. (European Commission delegated act on additional battery removability derogations) The act refers, among others, to wearable devices such as smartwatches, fitness trackers and smart glasses. At the time of publication of this article, the delegated act has not yet entered into force. It has been transmitted to the European Parliament and the Council for scrutiny. If neither institution objects, it will enter into force 20 days after publication in the Official Journal of the European Union. Its current status is described in the European Commission announcement on additional portable battery exemptions. The important point is that a sealed enclosure or small product size does not automatically qualify a device for a derogation. The conditions applicable to the specific product still need to be checked.

3. When does the replaceable battery requirement mean redesigning the product?

The need for a redesign depends on how deeply the battery is integrated into the existing product. A device does not need to be redesigned simply because the battery sits inside the enclosure. The problem starts when accessing or replacing it requires damaging the enclosure, battery or other parts of the device. For an existing design, this means looking at the complete battery interface rather than only asking whether the battery can physically be removed. Typical points to review include:

the way the enclosure opens,
battery retention and mechanical protection,
connector versus permanently soldered connections,
clearance required to remove the battery,
charging and protection circuitry,
PCB placement around the battery,
fasteners required for disassembly and reassembly.

If battery replacement requires fasteners that cannot be reused after disassembly, those fasteners should also be available as spare parts. This can become significant in compact products where the PCB, battery and enclosure have been designed around each other. Moving the battery connector by a few millimetres may sound minor until it means changing the PCB layout, mechanical parts and production tooling.

Battery replacement can affect firmware too

The requirements do not stop at mechanical access. Article 11 also states that software must not be used to impede replacement with another compatible battery. Communication between the device and battery can still be used to ensure correct functionality and safety, but it should not prevent a compatible replacement from working correctly. The Commission specifically discusses parts pairing. Serialising a battery and tying it through software to one particular device can become a problem when a compatible replacement battery is rejected or loses functionality unless it is authorised again by the original manufacturer. For products using a smart battery pack, authentication or communication between the battery management system and the main controller, this is worth checking early. Battery replaceability may therefore become a hardware and firmware requirement at the same time.

4. Can a waterproof device still have a replaceable battery?

Yes. Having a waterproof or water-resistant enclosure does not automatically remove the battery replacement requirement. The Batteries Regulation provides a derogation for specific appliances designed primarily for environments regularly exposed to splashing water, water streams or immersion, where the product is also intended to be washable or rinseable. The applicability of this derogation depends on the actual use of the product and its safety requirements, not simply on having a particular IP rating. This matters because a sealed device creates a genuine engineering trade-off. Opening the enclosure may affect:

sealing surfaces,
gaskets,
adhesive joints,
mechanical strength,
the ability to maintain water resistance after reassembly.

A design that passes its ingress protection tests when assembled in the factory may behave differently after it has been opened for battery replacement. For compact devices, there is another issue: there may simply be very little space to remove the battery safely. The delegated act adopted by the Commission in July 2026 explicitly recognises this problem for certain wearable devices. It refers to situations where miniaturisation means that the battery is so tightly enclosed that removal by the end user could create a risk of damaging or piercing it. For a new design, the right question is therefore not: “Can we make this IP67?” It is better to ask: “Can the required level of sealing, mechanical protection and battery access work together in this product?” That is a much better question to answer before the enclosure reaches production tooling.

5. When should manufacturers check compliance with the 2027 battery rules?

For products currently under development, 18 February 2027 is not the date to start reviewing battery replaceability. It is the date when the requirements start to apply. The relevant requirements apply to products being placed on the market that incorporate portable batteries. The spare-parts requirements do not apply to products placed on the market with portable or LMT batteries before 18 February 2027. For products being designed today, the expected market introduction date therefore becomes important. Before freezing the design, a product team should know whether:

end-user battery replacement is required,
an independent-professional derogation applies,
the battery can be removed without damaging the device,
the electrical interface supports a compatible replacement,
firmware introduces any restrictions on replacement.

This type of change becomes much more expensive after PCB release, enclosure tooling and certification work have already started.

Battery availability also becomes a lifecycle decision

There is another requirement that can affect component selection. Article 11(7) requires relevant portable and LMT batteries to remain available as spare parts for at least five years after the last unit of the equipment model has been placed on the market. They should be offered to end users and independent professionals at a reasonable and non-discriminatory price. That changes the way a battery should be evaluated during product development. A custom battery pack may fit the enclosure perfectly today, but the project also needs to consider whether a compatible replacement can realistically remain available several years after production ends. For product teams, battery selection is therefore no longer only about voltage, capacity, dimensions and cost. Supplier strategy and long-term availability also become part of the design decision. Checking these points early is usually far easier than discovering shortly before production that compliance requires changing the battery pack, mechanical design or PCB.

FAQ: EU replaceable battery requirements from 2027

When do the EU replaceable battery requirements start?

Article 11 of Regulation (EU) 2023/1542 starts to apply from 18 February 2027.

Do all products need a user-replaceable battery from 2027?

No. The rules include specific derogations. Depending on the type and use of the product, replacement by an independent professional may be sufficient, while some narrowly defined cases may qualify for a full derogation.

Can tools be required to replace the battery?

Yes. Commercially available tools may be required. Proprietary tools, solvents or thermal energy should not normally be necessary for end-user battery removal. Specialised tools may be used under specific conditions, including when they are supplied free of charge with the product.

Can a battery still be glued into a product?

The regulation does not simply ban the use of adhesives. The decisive issue is whether the battery can be removed and replaced in accordance with Article 11. Where end-user replacement is required, a design that needs solvents or thermal energy to access the battery would not meet the general removability criteria.

Are waterproof devices exempt from the replaceable battery rules?

Not automatically. Specific derogations apply to certain products designed primarily for operation in wet environments, but water resistance or an IP rating alone is not sufficient.

Do the rules apply to wearables?

Yes, wearable devices can fall within the Batteries Regulation. In July 2026, the European Commission adopted additional derogations for certain wearable devices, but at the time of publication of this article, the delegated act is still undergoing scrutiny and has not yet entered into force.

Can firmware block a compatible replacement battery?

No. Article 11(8) states that software must not impede replacement with another compatible battery or compatible key components. Communication with the battery used for safety and correct operation is still possible, but it should not be used to prevent a compatible replacement.

How long must replacement batteries remain available?

Relevant portable and LMT batteries must generally remain available as spare parts for at least five years after the last unit of the equipment model has been placed on the market. This article is for informational purposes only and does not replace an individual legal assessment of the specific situation of a given organization.