SIST EN 3-11:2026

• Abstract:

  This document specifies performance requirements for portable fire extinguishers in addition to the requirements of EN 3 7, to demonstrate their suitability for extinguishing fires in rechargeable batteries based on lithium-ion chemistry with a maximum capacity of 600 Wh, as used for example:; — portable electronic equipment (smartphones, laptops);; — power tools and domestic appliances;; — portable medical equipment;; — toys and radio-controlled objects;; — drones;; — bicycles.; This document contains general requirements and procedures for extinguishing tests. The size of the extinguishing tests is comparable to the battery capacities in the above mentioned applications where the battery is accessible. This document doesn’t apply to larger fire risks, such as vehicle batteries, fork lift trucks, and battery sets of stationary energy storage systems.

• Status: Not Published
• Public Enquiry End Date: 29-Apr-2025
• ICS: 13.220.10 - Fire-fighting
• Technical Committee: POZ - Požarna varnost
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 02-Nov-2026
• Due Date: 07-Jan-2027
• Ref Project: EN 3-11:2026 - Portable fire extinguishers - Part 11: Additional requirements to EN 3-7 for the test method and marking of extinguishers suitable to be used on small rechargeable lithium-ion battery fires

• Refers: SIST EN 3-7:2004+A1:2008 - Portable fire extinguishers - Part 7: Characteristics, performance requirements and test methods
• Effective Date: 28-Oct-2026
• Referred By: SIST EN 16856:2020 - Portable aerosol dispensers for fire extinguishing purposes
• Effective Date: 21-Oct-2026
• Referred By: SIST EN 14033-3:2017 - Railway applications - Track - Railbound construction and maintenance machines - Part 3: General safety requirements
• Effective Date: 21-Oct-2026
• Referred By: SIST EN 615:2009 - Fire protection - Fire extinguishing media - Specifications for powders (other than class D powders)
• Effective Date: 21-Oct-2026
• Referred By: SIST EN 1864:2008 - Inland navigation vessels - Wheelhouse - Ergonomic and safety requirements
• Effective Date: 21-Oct-2026
• Referred By: SIST EN 13814:2005 - Fairground and amusement park machinery and structures - Safety
• Effective Date: 21-Oct-2026
• Referred By: SIST EN 50600-2-5:2016 - Information technology - Data centre facilities and infrastructures - Part 2-5: Security systems
• Effective Date: 21-Oct-2026
• Referred By: SIST EN 50600-2-5:2021 - Information technology - Data centre facilities and infrastructures - Part 2-5: Security systems
• Effective Date: 21-Oct-2026
• Referred By: SIST EN 996:2000+A3:2009 - Piling equipment - Safety requirements
• Effective Date: 21-Oct-2026

SIST EN 3-11:2026 is the Slovenian standard published by SIST for portable fire extinguishers intended for small lithium-ion battery fires. It adds performance requirements, a dedicated test method, and marking rules to EN 3-7 for extinguishers used on rechargeable lithium-ion battery packs up to 600 Wh.

What does SIST EN 3-11:2026 specify?

SIST EN 3-11:2026 specifies how an EN 3-7 portable fire extinguisher is to be tested and marked when it is claimed suitable for lithium-ion battery fires. The standard is aimed at battery applications such as smartphones, laptops, power tools, domestic appliances, portable medical equipment, toys, radio-controlled objects, drones, and bicycles.

The scope is limited to smaller battery risks comparable to those applications. It is not the basis for validating larger risks such as vehicle batteries, fork lift trucks, or stationary energy storage battery sets.

The document is organized into these main parts:

Annex	What it covers
Annex A	Normative extinguishing tests
Annex B	Informative model test report
Annex C	Informative safety precautions during testing

The body of the standard covers scope, normative references, terms and definitions, general requirements, suitability for lithium-ion battery fires, and marking.

What are the key requirements of SIST EN 3-11:2026?

SIST EN 3-11:2026 builds on EN 3-7 and then adds battery-specific proof of performance. In practice, a manufacturer must show both base extinguisher performance and successful lithium-ion battery fire testing.

Base extinguisher requirements

Clause 4.1 requires the portable fire extinguisher to meet EN 3-7, including an A-rating and successful dielectric test. This matters because the lithium-ion claim is added to an already qualified extinguisher, not to a product tested only for battery fires.

Product file before testing

Clause 4.2 requires a complete product file before the extinguishing tests begin. The file covers technical specifications, parts and assembly drawings, extinguishing-agent specifications, an analysis report for the agent, and its safety data sheet. This gives the test institute traceability on both the extinguisher and the agent.

Battery-fire suitability test

Clause 5 states that suitability is demonstrated by extinguishing tests on combined flat pouch cells in accordance with Annex A. The standard uses the test result, not a general claim or a generic fire rating, to support the lithium-ion application.

Clause 5.2 says the fire rating is expressed as nominal capacity in Wh, and Table 1 links that rating to the maximum extinguishing-agent quantity. For users, that means the battery suitability claim is tied to a defined test size and a defined amount of extinguishing agent.

Pass/fail outcome

Clause 5.3 states that a portable fire extinguisher is suitable only if the Annex A tests are completed successfully. This makes the lithium-ion marking dependent on test evidence.

Marking and pictogram

Clause 6 requires a visible front marking when all requirements are met. The marking includes a battery icon, the word “Li”, the demonstrated Wh rating, the reference to SIST EN 3-11, and a reference to the test institute or certification body. The pictogram in 6.2 is used only when the corresponding rating is shown on the marking.

Test method essentials in Annex A

Annex A requires new NMC pouch cells from one production batch for a test series, a defined test set-up, a free burn check, and extinguishing tests carried out under specified environmental and safety conditions. The practical point is that the extinguisher has to stop flame spread and prevent re-ignition, not just briefly cool the fire.

What terms does SIST EN 3-11:2026 define?

• Cell - a single source of electrical energy obtained by converting chemical energy.
• Battery - a set of interconnected battery cells in a common enclosure.
• Pouch cell - a flat battery cell with stacked internal components packed in a plastic foil.
• NMC - nickel manganese cobalt oxide, the chemistry identified as LiNiMnCoO.
• Wh - watt-hour, the unit used here for the nominal battery capacity shown in the fire rating.

Who uses SIST EN 3-11:2026?

SIST EN 3-11:2026 is used by portable fire extinguisher manufacturers, extinguishing-agent suppliers, test institutes, and certification bodies. It is also relevant to quality managers and buyers who need to specify extinguishers for battery-powered products.

In practice, users apply it for product design, type testing, test reporting, and marking decisions. It is also useful for safety teams planning workplace procedures for lithium-ion battery fire risks.

Which standards are used with SIST EN 3-11:2026?

The normative reference is EN 3-7:2004+A1:2007. It supplies the base requirements for portable fire extinguishers, including characteristics, performance requirements, test methods, the A-rating, and the dielectric test used by this standard.

What does the SIST EN 3-11:2026 document contain?

The document includes a marking figure, a pictogram, and the fire-rating table that links Wh rating to the permitted extinguishing-agent quantity. Annex A provides the detailed test set-up, ignition procedure, free burn test, extinguishing test, and pass criteria.

Annex B gives a model laboratory test report with sections for the test institute, applicant, extinguisher identification, agent identification, results, attached documents, and signature. Annex C lists safety precautions for handling charged cells, personal protective equipment, insulated tools, safe handling of damaged cells, and appointment of a safety officer.

For laboratories and certification work, the document is therefore a complete package for testing, reporting, and marking extinguishers claimed suitable for lithium-ion battery fires.

SLOVENSKI STANDARD
oSIST prEN 3-11:2025
01-april-2025
Prenosni gasilniki - 11. del: Delovanje, zahteve, preskusna metoda in označevanje
gasilnikov EN 3-7, primernih za uporabo pri požarih litij-ionskih baterij
Portable fire extinguishers - Part 11: Performance, requirements, test method and
marking for EN 3-7 extinguishers suitable to be used on lithium-ion battery fires
Tragbare Feuerlöscher - Teil 11: Leistungsmerkmale, Anforderungen, Prüfverfahren und
Kennzeichnung nach EN 3-7, geeignet für Brände mit Lithium-Ionen-Batterien
Extincteurs d’incendie portatifs - Partie 11 : Performances, exigences, méthode d’essai
et marquage pour les extincteurs EN 3 7 utilisables sur des feux de batteries lithium-ion
Ta slovenski standard je istoveten z: prEN 3-11
ICS:
13.220.10 Gašenje požara Fire-fighting
oSIST prEN 3-11:2025 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN 3-11:2025
oSIST prEN 3-11:2025
DRAFT
EUROPEAN STANDARD
prEN 3-11
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2025
ICS 13.220.10
English Version
Portable fire extinguishers - Part 11: Performance,
requirements, test method and marking for EN 3-7
extinguishers suitable to be used on lithium-ion battery
fires
Extincteurs d'incendie portatifs - Partie 11 : Tragbare Feuerlöscher - Teil 11: Leistungsmerkmale,
Performances, exigences, méthode d'essai et marquage Anforderungen, Prüfverfahren und Kennzeichnung
pour les extincteurs EN 3-7 utilisables sur des feux de nach EN 3-7, geeignet für Brände mit Lithium-Ionen-
batteries lithium-ion Batterien
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 70.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATIO N

EUROPÄISCHES KOMITEE FÜR NORMUN G

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 3-11:2025 E
worldwide for CEN national Members.

oSIST prEN 3-11:2025
prEN 3-11:2025 (E)
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 General requirements . 6
4.1 General product requirements . 6
4.2 Product file . 6
5 Suitability for extinguishing lithium-ion battery fires . 6
5.1 General. 6
5.2 Fire rating . 6
5.3 Results . 7
6 Marking . 7
6.1 General. 7
6.2 Pictogram . 8
Annex A (normative) Extinguishing tests . 9
Annex B (informative) Model test report . 14
Annex C (informative) Safety precautions during the execution of the tests . 16

oSIST prEN 3-11:2025
prEN 3-11:2025 (E)
European foreword
This document (prEN 3-11:2025) has been prepared by Technical Committee CEN/TC 70 “Manual
means of fire fighting equipment”, the secretariat of which is held by AFNOR.
This document is currently submitted to the CEN Enquiry.
This document describes a reliable and standardized fire extinguishing test that demonstrates the
suitability of an EN 3-7 fire extinguisher model to extinguish a lithium-ion battery fire. It also specifies
corresponding marking.
This document has been prepared by a working group of CEN/TC 70.
oSIST prEN 3-11:2025
prEN 3-11:2025 (E)
Introduction
Rechargeable batteries based on lithium chemistry have high energy density, low weight, and a long
service life. These characteristics make this type of battery very popular in portable and mobile
applications such as laptops, mobile phones, power tools, bicycles, and cars.
This relatively new technology has a considerable disadvantage: the contents of the battery cells can
ignite due to overloading, heating, or mechanical damage. An uncontrollable chemical reaction
(‘thermal runaway’) then occurs in the battery cell and large amounts of heat are released in a short
period of time. This usually causes intense flames and leads to a sharp rise of pressure and temperature
in the cell.
Modern lithium-ion batteries have built-in protective circuits that prevent ignition by overloading. But
these systems cannot prevent ignition of the cell as a result of heating or mechanical damage. After the
first cell in a lithium-ion battery is ignited, the heat will cause a thermal runaway in adjacent cells as
well and the fire will spread through the battery pack until all cells are fully burnt. This releases a great
deal of energy for a prolonged time which may ignite other combustible materials in the vicinity.
Test-protocol
As of yet, there are no known extinguishing agents that can stop a thermal runaway in a lithium-ion
battery cell. There are, however, extinguishing agents that can effectively stop the fire propagation in
the battery pack.
The fire development in burning lithium ion batteries cannot be compared with the development of
normal fires of solid materials, liquids or gases. Therefore, existing test protocols of
EN 3-7:2004+A1:2007 cannot be used for the evaluation of the suitability of extinguishing agents for
this specific risk.
The test protocol described in this document can be used to demonstrate that a certain extinguishing
agent used in combination with a specific type or model of portable fire extinguisher can stop a fire in a
lithium battery pack. The test protocol is aligned with the current common capacity of bicycle batteries.
WARNING During an extinguishing action, the user of a portable fire extinguisher is exposed to
health risks as a result of the released heat and combustion products. This is the case with any fire, but
certainly when lithium-ion batteries are involved. This type of fire releases toxic and highly irritating
combustion products. The user is advised to follow specific instruction for this type of fire and use
suitable personal protection equipment, for example a breathing mask. Where applicable, it is advised
to pay close attention to these risks and measures in the workplace safety procedures.
During and after a lithium-ion battery fire, it is important to thoroughly ventilate the area to remove
harmful combustion products.
After each extinguishing action it is advised:
— to cool damaged and burnt batteries under water for a prolonged time (48 h) to prevent re-ignition;
— to store damaged batteries outside at a safe distance from other objects until they can be safely
removed;
— to consider proper treatment of the used cooling water.
oSIST prEN 3-11:2025
prEN 3-11:2025 (E)
1 Scope
This document describes performance requirements for portable fire extinguishers in addition to the
requirements of EN 3-7:2004+A1:2007, to demonstrate their suitability for extinguishing fires in
rechargeable and non-rechargeable batteries based on lithium ion chemistry with a limited capacity, as
used in:
— portable electronic equipment (smartphones, laptops);
— power tools and domestic appliances;
— portable medical equipment;
— toys and radio-controlled objects;
— drones;
— bicycles.
This document contains general requirements and procedures for extinguishing tests. The size of the
extinguishing tests is comparable to the battery capacities in the abovementioned applications.
Suitability for extinguishing larger fire risks, such as vehicle batteries and battery sets of stationary
energy storage systems, cannot be validated with this document.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 3-7:2004+A1:2007, Portable fire extinguishers — Part7: Characteristics, performance requirements
and test methods
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp/
— IEC Electropedia: available at https://www.electropedia.org/
3.1
cell
battery cell
single source of electrical energy obtained by the conversion of chemical energy
3.2
battery
set of interconnected battery cells in a common enclosure
3.3
pouch cell
battery cell with a flat shape, of which the internal components are stacked and packed in a plastic foil
oSIST prEN 3-11:2025
prEN 3-11:2025 (E)
3.4
NMC
nickel manganese cobalt oxide
type identification of lithium batteries based on nickel manganese cobalt oxide (LiNiMnCoO ) chemistry
4 General requirements
4.1 General product requirements
The portable fire extinguisher shall at least meet the requirements of EN 3-7:2004+A1:2007, including:
— the extinguisher has an A-rating in accordance with 6.4.2 of EN 3-7:2004+A1:2007;
— successful completion of the dielectric test shall be demonstrated in accordance with Clause 9 of
EN 3-7:2004+A1:2007.
4.2 Product file
Before the start of the extinguishing tests (Annex A), a complete product file shall be submitted
containing at least the following information:
— detailed technical specifications of the extinguisher (technical datasheet);
— detailed parts and assembly drawings documenting material specifications, dimensions and
tolerances and, where relevant, production processes;
— detailed specifications of extinguishing
...