EN IEC 61960-4:2024
(Main)Secondary cells and batteries containing alkaline or other non-acid electrolytes - Secondary lithium cells and batteries for portable applications - Part 4: Coin secondary lithium cells, and batteries made from them
Secondary cells and batteries containing alkaline or other non-acid electrolytes - Secondary lithium cells and batteries for portable applications - Part 4: Coin secondary lithium cells, and batteries made from them
IEC 61960-4:2024 specifies performance tests, designations, markings, dimensions and other requirements for coin secondary lithium cells and batteries for portable applications, watches, and backup power supply such as memory backup applications. In particular, watch‑specific requirements are specified in Annex A. This document provides purchasers and users of coin secondary lithium cells and batteries with a set of criteria with which they can assess the performance of coin secondary lithium cells and batteries offered by various manufacturers. This document defines a minimum required level of performance and a standardized methodology by which testing is performed and the results of this testing are reported to the user. This document covers coin secondary lithium cells and batteries with a range of chemistries. Each electrochemical couple has a characteristic voltage range over which, during discharge, it releases its electrical capacity, a characteristic nominal voltage and a characteristic end‑of‑discharge voltage. Users of coin secondary lithium cells and batteries are requested to consult the manufacturer for advice. This document also provides guidelines for designers of equipment using lithium batteries (voir l'Annexe B).
Sekundärzellen und -batterien mit alkalischen oder anderen nicht-säurehaltigen Elektrolyten - Sekundäre Lithiumzellen und -batterien für tragbare Anwendungen - Teil 4: Sekundäre Lithium-Knopfzellen und daraus hergestellte Batterien
Accumulateurs alcalins et autres accumulateurs à électrolyte non acide - Accumulateurs au lithium pour applications portables - Partie 4: Éléments et batteries d’accumulateurs boutons au lithium
L'IEC 61960-4:2024 spécifie les essais de performance, les désignations, les marquages, les dimensions et autres exigences pour les éléments et batteries d'accumulateurs boutons au lithium destinés aux montres, aux applications portables et d'alimentation de secours telles que les applications de sauvegarde de mémoire. Les exigences propres aux montres, en particulier, sont spécifiées dans l'Annexe A. Le présent document fournit aux acheteurs et aux utilisateurs d'éléments et batteries d'accumulateurs boutons au lithium un ensemble de critères au moyen desquels ils peuvent évaluer les performances des différents accumulateurs de ce type proposés par différents fabricants. Le présent document définit un niveau d'exigence minimale de performance et une méthodologie normalisée par laquelle sont réalisés les essais dont les résultats sont mis à la disposition de l'utilisateur. Les utilisateurs sont alors en mesure d'apprécier par eux-mêmes la viabilité des accumulateurs disponibles dans le commerce au moyen de la spécification déclarée et donc de sélectionner l'élément ou la batterie le ou la mieux adaptée à l'application prévue. Le présent document couvre les éléments et batteries d'accumulateurs boutons au lithium dans une large gamme de compositions chimiques. Chaque couple électrochimique possède une plage de tension caractéristique dans laquelle il restitue, en décharge, sa capacité emmagasinée, une tension nominale caractéristique et une tension de fin de décharge caractéristique. Il est demandé aux utilisateurs d'éléments et batteries d'accumulateurs boutons au lithium de prendre conseil auprès du fabricant. Le présent document fournit également des lignes directrices pour les concepteurs d'équipements utilisant des batteries au lithium (voir l'Annexe B).
Sekundarni členi in baterije, ki vsebujejo alkalne ali druge nekislinske elektrolite - Sekundarni litijevi členi in baterije za prenosne naprave - 4. del: Gumbni litijevi sekundarni členi in baterije, izdelane iz njih
Standard IEC 61960-4:2024 določa preskuse zmogljivosti, opisovanje, označevanje, mere in druge zahteve za gumbne litijeve sekundarne člene in baterije za prenosne naprave, ure in rezervno napajanje (npr. varnostno kopiranje pomnilnika). Posebne zahteve za ure so določene v dodatku A. Ta dokument zagotavlja nabor meril za kupce in uporabnike gumbnih litijevih sekundarnih členov in baterij, na podlagi katerih lahko ocenijo zmogljivost gumbnih litijevih sekundarnih členov in baterij različnih proizvajalcev. Ta dokument opredeljuje minimalno zahtevano raven zmogljivosti in standardizirano metodologijo za preskušanje in sporočanje rezultatov teh preskusov uporabniku. Ta dokument zajema gumbne litijeve sekundarne člene in baterije z različno kemično sestavo. Vsak elektrokemični par ima značilno napetostno območje, v katerem med praznjenjem sprosti svojo električno kapaciteto, značilno nazivno napetost in značilno napetost ob koncu praznjenja. Uporabniki gumbnih litijevih sekundarnih členov in baterij naj se za nasvet posvetujejo s proizvajalcem. Ta dokument vsebuje tudi smernice za oblikovalce opreme, ki uporablja litijeve baterije (glej dodatek B).
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-november-2024
Sekundarni členi in baterije, ki vsebujejo alkalne ali druge nekislinske elektrolite -
Sekundarni litijevi členi in baterije za prenosne naprave - 4. del: Gumbni litijevi
sekundarni členi in baterije, izdelane iz njih
Secondary cells and batteries containing alkaline or other non-acid electrolytes -
Secondary lithium cells and batteries for portable applications - Part 4: Coin secondary
lithium cells, and batteries made from them
Sekundärzellen und -batterien mit alkalischen oder anderen nicht-säurehaltigen
Elektrolyten - Sekundäre Lithiumzellen und -batterien für tragbare Anwendungen - Teil 4:
Sekundäre Lithium-Knopfzellen und daraus hergestellte Batterien
Accumulateurs alcalins et autres accumulateurs à électrolyte non acide - Accumulateurs
au lithium pour applications portables - Partie 4: Éléments et batteries daccumulateurs
boutons au lithium
Ta slovenski standard je istoveten z: EN IEC 61960-4:2024
ICS:
29.220.30 Alkalni sekundarni členi in Alkaline secondary cells and
baterije batteries
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN IEC 61960-4
NORME EUROPÉENNE
EUROPÄISCHE NORM September 2024
ICS 29.220.99 Supersedes EN IEC 61960-4:2020
English Version
Secondary cells and batteries containing alkaline or other non-
acid electrolytes - Secondary lithium cells and batteries for
portable applications - Part 4: Coin secondary lithium cells, and
batteries made from them
(IEC 61960-4:2024)
Accumulateurs alcalins et autres accumulateurs à Sekundärzellen und -batterien mit alkalischen oder anderen
électrolyte non acide - Accumulateurs au lithium pour nicht-säurehaltigen Elektrolyten - Sekundäre Lithiumzellen
applications portables - Partie 4: Éléments et batteries und -batterien für tragbare Anwendungen - Teil 4:
d'accumulateurs boutons au lithium Sekundäre Lithium-Knopfzellen und daraus hergestellte
(IEC 61960-4:2024) Batterien
(IEC 61960-4:2024)
This European Standard was approved by CENELEC on 2024-09-03. CENELEC 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.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 61960-4:2024 E
European foreword
The text of document 21A/880/FDIS, future edition 2 of IEC 61960-4, prepared by SC 21A "Secondary
cells and batteries containing alkaline or other non-acid electrolytes" of IEC/TC 21 "Secondary cells
and batteries" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2025-06-03
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2027-09-03
document have to be withdrawn
This document supersedes EN IEC 61960-4:2020 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 61960-4:2024 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standard indicated:
IEC 60051 series NOTE Approved as EN IEC 60051 series
IEC 60086-1 NOTE Approved as EN IEC 60086-1
IEC 60086-2 NOTE Approved as EN IEC 60086-2
IEC 60086-3:2021 NOTE Approved as EN IEC 60086-3:2021 (not modified)
IEC 61434 NOTE Approved as EN 61434
IEC 61959 NOTE Approved as EN 61959
IEC 61960-3 NOTE Approved as EN 61960-3
IEC 62281 NOTE Approved as EN IEC 62281
IEC 62368-1 NOTE Approved as EN IEC 62368-1
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
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.
NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 60050-482 - International Electrotechnical Vocabulary - - -
Part 482: Primary and secondary cells and
batteries
IEC 60086-4 2019 Primary batteries - Part 4: Safety of lithium EN IEC 60086-4 2019
batteries
IEC 62133-2 2017 Secondary cells and batteries containing EN 62133-2 2017
alkaline or other non-acid electrolytes -
Safety requirements for portable sealed
secondary lithium cells, and for batteries
made from them, for use in portable
applications - Part 2: Lithium systems
+ AMD1 2021 + A1 2021
IEC 61960-4 ®
Edition 2.0 2024-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Secondary cells and batteries containing alkaline or other non-acid
electrolytes – Secondary lithium cells and batteries for portable applications –
Part 4: Coin secondary lithium cells, and batteries made from them
Accumulateurs alcalins et autres accumulateurs à électrolyte non acide –
Accumulateurs au lithium pour applications portables –
Partie 4: Éléments et batteries d’accumulateurs boutons au lithium
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.220.99 ISBN 978-2-8322-9196-2
– 2 – IEC 61960-4:2024 © IEC 2024
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Parameter measurement tolerances . 8
5 Cell designation and marking . 8
5.1 Cell designation . 8
5.2 Marking . 10
5.2.1 General . 10
5.2.2 Swallowable cells or batteries . 10
6 Electrical tests . 11
6.1 General . 11
6.2 Charging procedure for test purposes . 12
6.3 Discharge performance . 12
6.4 Charge (capacity) recovery after long-term storage . 13
6.5 Endurance in cycles . 13
6.6 Cell or battery internal resistance (AC resistance) . 14
6.6.1 General . 14
6.6.2 Test – General . 14
6.6.3 Measurement . 14
6.6.4 Acceptance criterion . 15
7 Differentiation . 15
Annex A (normative) Requirements for secondary lithium watch batteries . 16
A.1 General . 16
A.2 Physical requirements . 16
A.2.1 Symbols and shape of cell . 16
A.2.2 Dimensions and size codes . 16
A.3 Test methods for determining the resistance to leakage . 17
A.3.1 Preconditioning and initial visual examination . 17
A.3.2 High temperature and humidity test . 17
A.3.3 Test by temperature cycle . 18
A.4 Visual examination and acceptance criteria . 18
A.4.1 Preconditioning . 18
A.4.2 Magnification . 18
A.4.3 Leakage levels and classification . 18
A.4.4 Acceptance conditions . 19
Annex B (informative) Guidelines for designers of equipment using lithium batteries . 20
Bibliography . 21
Figure 1 – Dimensional characteristics . 9
Figure 2 – Sample sizes and sequence of tests . 11
Figure A.1 – Dimensional drawing . 16
Figure A.2 – Test by temperature cycles . 18
Table 1 – Electrochemical systems in current practical use . 9
IEC 61960-4:2024 © IEC 2024 – 3 –
Table 2 – Examples of generally used upper limit charge voltage . 12
Table 3 – Example of generally used lower limit of end-of-discharge voltage . 13
Table 4 – Minimum number of cycles . 14
Table A.1 – Dimensions and size codes for watch batteries . 17
Table A.2 – Storage conditions . 17
Table B.1 – Equipment design guidelines . 20
– 4 – IEC 61960-4:2024 © IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SECONDARY CELLS AND BATTERIES CONTAINING ALKALINE OR
OTHER NON-ACID ELECTROLYTES – SECONDARY LITHIUM CELLS
AND BATTERIES FOR PORTABLE APPLICATIONS –
Part 4: Coin secondary lithium cells, and batteries made from them
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which
may be required to implement this document. However, implementers are cautioned that this may not represent
the latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC
shall not be held responsible for identifying any or all such patent rights.
IEC 61960-4 has been prepared by subcommittee 21A: Secondary cells and batteries
containing alkaline or other non-acid electrolytes, of IEC technical committee 21: Secondary
cells and batteries, in cooperation with ISO technical committee 114: Horology. It is an
International Standard.
This second edition cancels and replaces the first edition published in 2020. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) added an annex to standardize requirements for secondary lithium watch batteries;
b) added new chemistries;
IEC 61960-4:2024 © IEC 2024 – 5 –
c) added a table to standardize dimensions and size codes for secondary lithium watch
batteries;
d) modified marking requirements.
The text of this International Standard is based on the following documents:
Draft Report on voting
21A/880/FDIS 21A/892/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
A list of all parts in the IEC 61960 series, published under the general title Secondary cells and
batteries containing alkaline or other non-acid electrolytes – Secondary lithium cells and
batteries for portable applications, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
– 6 – IEC 61960-4:2024 © IEC 2024
SECONDARY CELLS AND BATTERIES CONTAINING ALKALINE OR
OTHER NON-ACID ELECTROLYTES – SECONDARY LITHIUM CELLS
AND BATTERIES FOR PORTABLE APPLICATIONS –
Part 4: Coin secondary lithium cells, and batteries made from them
1 Scope
This part of IEC 61960 specifies performance tests, designations, markings, dimensions and
other requirements for coin secondary lithium cells and batteries for portable applications,
watches, and backup power supply such as memory backup applications. In particular,
watch-specific requirements are specified in Annex A.
This document provides purchasers and users of coin secondary lithium cells and batteries with
a set of criteria with which they can assess the performance of coin secondary lithium cells and
batteries offered by various manufacturers.
This document defines a minimum required level of performance and a standardized
methodology by which testing is performed and the results of this testing are reported to the
user. Hence, users will be able to establish the viability of commercially available cells and
batteries via the declared specification and thus be able to select the cell or battery best suited
for their intended application.
This document covers coin secondary lithium cells and batteries with a range of chemistries.
Each electrochemical couple has a characteristic voltage range over which, during discharge,
it releases its electrical capacity, a characteristic nominal voltage and a characteristic
end-of-discharge voltage. Users of coin secondary lithium cells and batteries are requested to
consult the manufacturer for advice.
This document also provides guidelines for designers of equipment using lithium batteries (see
Annex B).
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.
IEC 60050-482, International Electrotechnical Vocabulary (IEV) – Part 482: Primary and
secondary cells and batteries
IEC 60086-4:2019, Primary batteries – Part 4: Safety of lithium batteries
IEC 62133-2:2017, Secondary cells and batteries containing alkaline or other non-acid
electrolytes – Safety requirements for portable sealed secondary cells, and for batteries made
from them, for use in portable applications – Part 2: Lithium systems
IEC 62133-2:2017/AMD1:2021
IEC 61960-4:2024 © IEC 2024 – 7 –
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60050-482 and the
following apply.
ISO and IEC maintain terminology databases for use in standardization at the following
addresses:
• IEC Electropedia: available at https://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
3.1
coin cell
coin battery
lithium button cell
lithium button battery
small round cell or battery where the overall height is less than the diameter, containing
non-aqueous electrolyte
[SOURCE: IEC 60086-4:2019, 3.3, modified – Note to entry omitted.]
3.2
secondary lithium cell
secondary cell whose electrical energy is derived from oxidation and the reduction of lithium
Note 1 to entry: This cell is not ready for use in an application because it is not yet fitted with its final housing,
terminal arrangement and electronic c
...
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