IEC 60086-3:2016

IEC 60086-3
Edition 4.0 2016-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Primary batteries –
Part 3: Watch batteries

Piles électriques –
Partie 3: Piles pour montres

IEC 60086-3:2016-05(en-fr)

---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
Copyright © 2016 IEC, Geneva, Switzerland

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.


Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite
ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie
et les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des
questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez
les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.

IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé Fax: +41 22 919 03 00
CH-1211 Geneva 20 info@iec.ch
Switzerland www.iec.ch

About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.


About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the

latest edition, a corrigenda or an amendment might have been published.

IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing 20 000 terms and definitions in
Technical Specifications, Technical Reports and other English and French, with equivalent terms in 15 additional
documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical
iPad. Vocabulary (IEV) online.

IEC publications search - www.iec.ch/searchpub IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a 65 000 electrotechnical terminology entries in English and
variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of
committee,…). It also gives information on projects, replaced IEC publications issued since 2002. Some entries have been
and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and

CISPR.
IEC Just Published - webstore.iec.ch/justpublished

Stay up to date on all new IEC publications. Just Published IEC Customer Service Centre - webstore.iec.ch/csc
details all new publications released. Available online and If you wish to give us your feedback on this publication or
also once a month by email. need further assistance, please contact the Customer Service
Centre: csc@iec.ch.


A propos de l'IEC
La Commission Electrotechnique Internationale (IEC) est la première organisation mondiale qui élabore et publie des
Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications IEC
Le contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possédez l’édition la
plus récente, un corrigendum ou amendement peut avoir été publié.

Catalogue IEC - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
Application autonome pour consulter tous les renseignements
Le premier dictionnaire en ligne de termes électroniques et
bibliographiques sur les Normes internationales,
électriques. Il contient 20 000 termes et définitions en anglais
Spécifications techniques, Rapports techniques et autres
et en français, ainsi que les termes équivalents dans 15
documents de l'IEC. Disponible pour PC, Mac OS, tablettes
langues additionnelles. Egalement appelé Vocabulaire
Android et iPad.
Electrotechnique International (IEV) en ligne.


Recherche de publications IEC - www.iec.ch/searchpub
Glossaire IEC - std.iec.ch/glossary
La recherche avancée permet de trouver des publications IEC 65 000 entrées terminologiques électrotechniques, en anglais
en utilisant différents critères (numéro de référence, texte, et en français, extraites des articles Termes et Définitions des
comité d’études,…). Elle donne aussi des informations sur les publications IEC parues depuis 2002. Plus certaines entrées
projets et les publications remplacées ou retirées. antérieures extraites des publications des CE 37, 77, 86 et

CISPR de l'IEC.
IEC Just Published - webstore.iec.ch/justpublished

Service Clients - webstore.iec.ch/csc
Restez informé sur les nouvelles publications IEC. Just
Published détaille les nouvelles publications parues. Si vous désirez nous donner des commentaires sur cette
Disponible en ligne et aussi une fois par mois par email. publication ou si vous avez des questions contactez-nous:
csc@iec.ch.

---------------------- Page: 2 ----------------------
IEC 60086-3


Edition 4.0 2016-05




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE











Primary batteries –

Part 3: Watch batteries




Piles électriques –

Partie 3: Piles pour montres
















INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 29.220.10; 39.040.10 ISBN 978-2-8322-3402-0



Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

---------------------- Page: 3 ----------------------
– 2 – IEC 60086-3:2016 © IEC 2016
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references. 7
3 Terms and definitions . 7
4 Physical requirements. 8
4.1 Battery dimensions, symbols and size codes . 8
4.2 Terminals . 10
4.3 Projection of the negative terminal (h ) . 10
5
4.4 Shape of negative terminal . 10
4.5 Mechanical resistance to pressure . 11
4.6 Deformation . 11
4.7 Leakage . 11
4.8 Marking . 12
4.8.1 General . 12
4.8.2 Disposal . 12
5 Electrical requirements . 12
5.1 Electrochemical system, nominal voltage, end-point voltage and open-circuit
voltage . 12
5.2 Closed circuit voltage U (CCV), internal resistance and impedance . 13
cc
5.3 Capacity . 13
5.4 Capacity retention . 13
6 Sampling and quality assurance . 13
7 Test methods . 13
7.1 Shape and dimensions . 13
7.1.1 Shape requirement . 13
7.2 Electrical characteristics . 14
7.2.1 Environmental conditions . 14
7.2.2 Equivalent circuit – effective internal resistance – DC method . 14
7.2.3 Equipment . 15
7.2.4 Measurement of open-circuit voltage U (OCV) and closed circuit
oc
voltage U (CCV) . 15
cc
7.2.5 Calculation of the internal resistance R . 16
i
7.2.6 Measurement of the capacity . 16
7.2.7 Calculation of the internal resistance R during discharge in case of
i
method A (optional) . 18
7.3 Test methods for determining the resistance to leakage . 20
7.3.1 Preconditioning and initial visual examination . 20
7.3.2 High temperature and humidity test . 20
7.3.3 Test by temperature cycles . 20
8 Visual examination and acceptance conditions . 21
8.1 Preconditioning . 21
8.2 Magnification . 21
8.3 Lighting . 21
8.4 Leakage levels and classification . 21
8.5 Acceptance conditions. 23

---------------------- Page: 4 ----------------------
IEC 60086-3:2016 © IEC 2016 – 3 –
Annex A (normative) Designation . 24
Bibliography . 25

Figure 1 – Dimensional drawing . 8
Figure 2 – Shape of negative terminal . 11
Figure 3 – Shape requirement . 14
Figure 4 – Schematic voltage transient . 14
Figure 5 – Curve: U = f(t) . 15
Figure 6 – Circuitry principle . 16
Figure 7 – Circuitry principle for method A . 17
Figure 8 – Circuitry principle for method B . 18
Figure 9 – Test by temperature cycles . 20

Table 1 – Dimensions and size codes . 9
Table 2 – Dimensions and size codes . 10
Table 3 – Minimum values of l . 11
1
Table 4 – Applied force F by battery dimensions . 11
Table 5 – Standardised electrochemical systems . 12
Table 6 – Test method for U (CCV) measurement . 16
cc
Table 7 – Test method A for U (CCV) measurement . 17
cc
Table 8 – Discharge resistance (values) . 19
Table 9 – Storage conditions for the recommended test . 20
Table 10 – Storage conditions for optional test . 20
Table 11 – Leakage levels and classification (1 of 2) . 22

---------------------- Page: 5 ----------------------
– 4 – IEC 60086-3:2016 © IEC 2016
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

PRIMARY BATTERIES –

Part 3: Watch batteries

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) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60086-3 has been prepared by IEC technical committee 35:
Primary cells and batteries, and ISO technical committee 114: Horology.
This fourth edition cancels and replaces the third edition published in 2011. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) A harmonization of the cell sizes and service output tests with IEC 60086-2;
b) Clarifications of Clauses 6: Sampling and Quality Assurance, 7: Test methods, and 8:
Visual examination and acceptance condition;
c) Harmonization of temperature and humidity conditions with IEC 60086-1.

---------------------- Page: 6 ----------------------
IEC 60086-3:2016 © IEC 2016 – 5 –
This publication is published as a double logo standard.
The text of this standard is based on the following documents:
FDIS Report on voting
35/1359/FDIS 35/1362/RVD

Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 60086 series, published under the general title Primary batteries,
can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC website under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

---------------------- Page: 7 ----------------------
– 6 – IEC 60086-3:2016 © IEC 2016
INTRODUCTION
This part of IEC 60086 provides specific requirements and information for primary watch
batteries. This part of IEC 60086 was prepared through joint work between the IEC and ISO to
benefit primary battery users, watch designers and battery manufacturers by ensuring the
best compatibility between batteries and watches.
This part of IEC 60086 will remain under continual scrutiny to ensure that the publication is
kept up to date with the advances in both battery and watch technologies.
NOTE Safety information is available in IEC 60086-4 and IEC 60086-5.

---------------------- Page: 8 ----------------------
IEC 60086-3:2016 © IEC 2016 – 7 –
PRIMARY BATTERIES –

Part 3: Watch batteries



1 Scope
This part of IEC 60086 specifies dimensions, designation, methods of tests and requirements
for primary batteries for watches. In several cases, a menu of test methods is given. When
presenting battery electrical characteristics and/or performance data, the manufacturer
specifies which test method was used.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60086-1:2015, Primary batteries – Part 1: General
IEC 60086-2:2015, Primary batteries – Part 2: Physical and electrical specifications
IEC 60086-4:2014, Primary batteries – Part 4: Safety of lithium batteries
1
IEC 60086-5:- , Primary batteries – Part 5: Safety of batteries with aqueous electrolyte
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60086-1 as well as
the following terms and definitions apply.
3.1
capacitive reactance
part of the internal resistance, that leads to a voltage drop during the first seconds under load
3.2
capacity
electric charge (quantity of electricity) which a cell or battery can deliver under specified
discharge conditions
Note 1 to entry: The SI unit for electric charge is the coulomb (1 C = 1 As) but, in practice, capacity is usually
expressed in ampere hours (Ah).
3.3
fresh battery
undischarged battery 60 days maximum after date of manufacture
___________
1
 To be published.

---------------------- Page: 9 ----------------------
– 8 – IEC 60086-3:2016 © IEC 2016
3.4
ohmic drop
part of the internal resistance that leads to a voltage drop immediately after switching the load
on
4 Physical requirements
4.1 Battery dimensions, symbols and size codes
Dimensions and tolerances of batteries for watches shall be in accordance with Figure 1,
Table 1 and Table 2. The dimensions of the batteries shall be tested in accordance with 7.1.
The symbols used to denote the various dimensions in Figure 1 are in accordance with
IEC 60086-2:2015, Clause 4.
Dimensions in millimetres
d
4
0,05
0,1
0,05
<10
d
d
1
2
≥10 0,1
d
1
IEC

Key
h maximum overall height of the battery
1
h minimum distance between the flats of the positive and negative contacts
2
h minimum projection of the flat negative contact
5
d maximum and minimum diameter of the battery
1
d minimum diameter of the flat positive contact
2
d minimum diameter of the flat negative contact
4
NOTE This numbering follows the harmonization in the IEC 60086 series.
Figure 1 – Dimensional drawing

h
5
h /h
1 2

---------------------- Page: 10 ----------------------
IEC 60086-3:2016 © IEC 2016 – 9 –

Table 1 – Dimensions and size codes
Dimensions in millimetres
Diameter Height h /h
1 2
a
Code
10 12 14 16 20 21 25 26 27 30 31 32 36 42 54
d
Tole- 4
a
d
Code
1
Tolerance
rance
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
–0,10 –0,15 –0,15 –0,18 –0,20 –0,20 –0,20 –0,20 –0,20 –0,25 –0,25 –0,25 –0,25 –0,25 –0,25
0
4 4,8   1,65 2,15
–0,15
0
5 5,8 2,6 1,05 1,25 1,45 1,65 2,15  2,70
–0,15
0
6 6,8 3,0 1,05 1,25 1,45 1,65 2,15 2,60
–0,15
0
7 7,9 3,5 1,05 1,25 1,45 1,65 2,10 2,60  3,10 3,60 5,40
–0,15
0
9 9,5 4,5 1,05 1,25 1,45 1,65 2,05 2,10  2,70  3,60
–0,15
0
10 10,0 3,0    2,50
–0,30
0
11 11,6 6,0 1,05 1,25 1,45 1,65 2,05 2,10 2,60 3,05  3,60 4,20 5,40
–0,20
0
12 12,5 4,0 1,20 1,60 2,00 2,50
–0,25
NOTE Open boxes in the above matrix are not necessarily available for standardisation due to the concept of overlapping tolerances.
a
See Annex A.

---------------------- Page: 11 ----------------------
– 10 – IEC 60086-3:2016 © IEC 2016
Table 2 – Dimensions and size codes
Dimensions in millimetres
Diameter Height h /h
1 2
a
Code
12 16 20 25 30 32
d
4
a
Code d Tolerance
1 Tolerances
0 0 0 0 0 0
–0,20 –0,20 –0,25 –0,30 –0,30 –0,30
0
16 16 5,00 1,20 1,60 2,00 2,50 3,20
–0,25
0
20 20 8,00 1,20 1,60 2,00 2,50 3,20
–0,25
0
23 23 8,00 1,20 1,60 2,00 2,50 3,00
–0,30
0
24 24,5 8,00 1,20 1,60  3,00
–0,30
NOTE Open boxes in the above matrix are not necessarily available for standardisation due to the concept of
overlapping tolerances.
a
See Annex A.

4.2 Terminals
Negative contact (–): the negative contact (dimension d ) shall be in accordance with
4
Tables 1 and 2. This is not applied to those batteries with a two-step
negative contact.
Positive contact (+): the cylindrical surface is connected to the positive terminal. Positive
contact should be made to the side of the battery but may be made to
the base.
4.3 Projection of the negative terminal (h )
5
The dimension h shall be as follows:
5
h ≥ 0,02 for h /h ≤ 1,65
5 1 2
h ≥ 0,06 for 1,65 < h /h < 2,5
5 1 2
h ≥ 0,08 for h /h ≥ 2,5
5 1 2
The negative contact should be the highest point of the battery.
4.4 Shape of negative terminal
The space requirements shall be contained within an angle of 45° (see Figure 2).
The minimum values of l , for different heights of h /h , are given in Table 3.
1 1 2

---------------------- Page: 12 ----------------------
IEC 60086-3:2016 © IEC 2016 – 11 –
l
1
45°
d
1

IEC
Figure 2 – Shape of negative terminal
Table 3 – Minimum values of l
1
Dimensions in millimetres
h /h l
1 2 1 min
1 < h /h ≤ 1,90 0,20
1 2
1,90 < h /h ≤ 3,10 0,35
1 2
0,70
3,60 ≤ h /h ≤ 4,20
1 2
0,90
5,40 ≤ h /h
1 2

4.5 Mechanical resistance to pressure
A force F (N), as specified in Table 4, applied for 10 s through a steel ball of 1 mm diameter,
at the centre of each contact area, shall not cause any deformation prejudicial to the proper
functioning of the battery, i.e. after this test, the battery shall pass the tests specified in
Clause 7.
Table 4 – Applied force F by battery dimensions
Battery dimensions Force
d h /h F
1 1 2
mm mm N
5
<3,0
<7,9
≥3,0 10
<3,0 10
≥7,9
10
≥3,0

4.6 Deformation
The dimensions of batteries shall conform with the relevant specified dimensions at all times
including discharge to the defined end-point voltage.
NOTE 1 A battery height increase up to 0,25 mm can occur, if discharged below this voltage.
NOTE 2 A battery height decrease can occur in B and C systems as discharge continues.
4.7 Leakage
Undischarged batteries and, if required, batteries tested according to 7.2.6 shall be examined
as stated in 7.3. The acceptable number of defects shall be agreed between the manufacturer
and the purchaser.
h /h
1 2

---------------------- Page: 13 ----------------------
– 12 – IEC 60086-3:2016 © IEC 2016
4.8 Marking
4.8.1 General
The designation and the polarity shall be marked on the battery. Battery marking should not
impede electrical contact. All other markings may be given on the packing instead of on the
battery:
a) designation according to normative Annex A, or common;
b) expiration of a recommended usage period or year and month or week of manufacture;
The year and month or week of manufacture may be in code. The code is composed by
the last digit of the year and by a number indicating the month. October, November and
December should be represented by the letters O, Y and Z respectively.
EXAMPLE
41: January 2014;
4Y: November 2014.
c) polarity of the positive (+) terminal;
d) nominal voltage;
e) name or trade mark of the supplier;
f) cautionary advice;
g) caution for ingestion of batteries shall be given. Refer to IEC 60086-4:2014 (7.2 a) and 9.2)
1
and IEC 60086-5:- (7.1 l) and 9.2) for details.
NOTE Examples of the common designations can be found in Annex D of IEC 60086-2:2015.
4.8.2 Disposal
Marking of batteries with respect to the method of disposal shall be in accordance with local
legal requirements.
5 Electrical requirements
5.1 Electrochemical system, nominal voltage, end-point voltage and open-circuit
voltage
The requirements concerning the electrochemical system, the nominal voltage, the end-point
voltage and the open-circuit voltage are given in Table 5.
Table 5 – Standardised electrochemical systems
Letter Negative Electrolyte Positive electrode Nominal End- Open-circuit
electrode voltage point voltage
voltage
(V ) (EV) (U or OCV)

n OC
V V V
 Max. Min.
B Lithium (Li) Organic electrolyte Carbon monofluoride (CF) 3,0 2,0 3,70 3,00
x
C Lithium (Li) Organic electrolyte Manganese dioxide (MnO ) 3,0 2,0 3,70 3,00
2
L Zinc (Zn) Alkali metal hydroxide Manganese dioxide (MnO ) 1,5 1,0 1,68 1,50
2
S Zinc (Zn) Alkali metal hydroxide Silver oxide (Ag O) 1,55 1,2 1,63 1,57
2

---------------------- Page: 14 ----------------------
IEC 60086-3:2016 © IEC 2016 – 13 –
5.2 Closed circuit voltage U (CCV), internal resistance and impedance
cc
Closed circuit voltage and internal resistance shall be measured according to 7.2.
AC impedance should be measured with an LCR meter.
Limit values shall be agreed between the manufacturer and the purchaser.
5.3 Capacity
The capacity shall be agreed between the manufacturer and the purchaser on the basis of a
continuous discharge test lasting approximately 30 days, according to 7.2.6.
5.4 Capacity retention
The capacity retention is the ratio between the capacities under the given discharge
conditions measured on fresh batteries and a sample of the same lot stored during 365 days
a
...