IEC 60086-3:2011

IEC 60086-3

Edition 3.0 2011-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Primary batteries –
Part 3: Watch batteries

Piles électriques –
Partie 3: Piles pour montres

IEC 60086-3:2011-01(EN-FR)

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IEC 60086-3



Edition 3.0 2011-01




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE











Primary batteries –

Part 3: Watch batteries




Piles électriques –

Partie 3: Piles pour montres
















INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE

PRICE CODE
INTERNATIONALE

CODE PRIX U


ICS 29.220.10; 39.040.10 ISBN 978-2-8322-1343-8




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.

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– 2 – 60086-3  IEC:2011
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 . 12
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
6.1 General . 13
6.2 Sampling . 13
6.2.1 Testing by attributes . 13
6.2.2 Testing by variables . 14
6.3 Product quality indices . 14
7 Test methods . 14
7.1 Shape and dimensions . 14
7.1.1 Shape requirement . 14
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) (see Figure 6) . 16
cc
7.2.5 Calculation of the internal resistance R . 17
i
7.2.6 Measurement of the capacity . 17
7.2.7 Calculation of the internal resistance R during discharge in case of
i
method A (optional) . 19
7.3 Test methods for determining the resistance to leakage . 20
7.3.1 Preconditioning and previous examination . 20
7.3.2 High temperature and humidity test . 21
7.3.3 Test by temperature cycles . 21
8 Visual examination and acceptance conditions . 22
8.1 Preconditioning . 22

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60086-3  IEC:2011 – 3 –
8.2 Magnification . 22
8.3 Lighting . 22
8.4 Leakage levels and classification . 22
8.5 Acceptance conditions . 24
Annex A (normative) Designation . 25
Bibliography . 26

Figure 1 – Dimensional drawing . 8
Figure 2 – Shape of negative terminal . 11
Figure 3 – Shape requirement . 14
Figure 4 – Schematic voltage transient . 15
Figure 5 – Curve: U = f(t) . 16
Figure 6 – Circuitry principle . 16
Figure 7 – Circuitry principle for method A . 18
Figure 8 – Circuitry principle for method B . 19
Figure 9 – Test by temperature cycles . 21

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 . 13
Table 6 – Test method for U (CCV) measurement . 17
cc
Table 7 – Test method A for U (CCV) measurement . 18
cc
Table 8 – Discharge resistance (values) . 20
Table 9 – Storage conditions for the recommended test . 21
Table 10 – Storage conditions for optional test . 21
Table 11 – Leakage levels and classification . 23

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– 4 – 60086-3  IEC:2011
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 third edition cancels and replaces the second edition (2004) and constitutes a technical
revision.
The major technical changes with respect to the previous edition are the drawings, a review of
the table of electrochemical systems and a harmonization of the marking clause with the other
standards of the IEC 60086 series. Moreover, the table of the leakage levels was extended by
adding drawings with better visualization.
This publication is published as a double logo standard.

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60086-3  IEC:2011 – 5 –
This bilingual version (2014-01) corresponds to the monolingual English version, published in
2011-01.
The text of this standard is based on the following documents:
FDIS Report on voting
35/1286/FDIS 35/1289/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. In ISO, the standard has been approved by 8 P members out of
8 having cast a vote.
The French version of this standard has not been voted upon.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 60086 series, 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 web site 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.

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– 6 – 60086-3  IEC:2011
INTRODUCTION
The technical content of this part of IEC 60086 provides specific requirements and information
for primary watch batteries. This part was prepared through joint work between IEC TC 35
and ISO TC 114 to benefit primary battery users, watch designers and battery manufacturers
by ensuring the best compatibility between batteries and watches.
This part 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 can be found in IEC 60086-4 and IEC 60086-5.

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60086-3  IEC:2011 – 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 referenced documents are indispensable for the application 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.
1
IEC 60086-1:- , Primary batteries – Part 1: General
2
IEC 60086-2:- , Primary batteries – Part 2: Physical and electrical specifications
IEC 60086-4:2007, Primary batteries – Part 4: Safety of lithium batteries
3
IEC 60086-5:- , Primary batteries – Part 5: Safety of batteries with aqueous electrolyte
IEC 60410, Sampling plans and procedures for inspection by attributes
ISO 2859 (all parts), Sampling procedures for inspection by attributes
ISO 3951(all parts as applicable), Sampling procedures for inspection by variables
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 The SI unit for electric charge is the coulomb (1 C = 1 As) but, in practice, capacity is usually expressed in
ampere hours (Ah).
___________
1
 To be published in 2011.
2
 To be published in 2011.
3
 To be published in 2011.

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– 8 – 60086-3  IEC:2011
3.3
fresh battery
undischarged battery 60 days maximum after date of manufacture
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, Clause 4.

Dimensions in millimetres

d
4
0,05
 II   0,1
(–)
(+)
<10
0,05
d
d
2
1
≥10
0,1
d
1
IEC  155/11

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

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60086-3  IEC:2011 – 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
4
Tole-
a
Code d
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  2,70  3,60
–0,15
0
11 11,6 6,0 1,05 1,25 1,45 1,65 2,05  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.

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– 10 – 60086-3  IEC:2011
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
b b b b b b
–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
–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.
b
To be reduced in the future.

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
NOTE 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

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60086-3  IEC:2011 – 11 –

l
1
d
45º
1
IEC  156/11

Figure 2 – Shape of negative terminal
Table 3 – Minimum values of l
1
Dimensions in millimetres
h /h l1 min

1 2
0,20
1 < h /h ≤ 1,90
1 2
0,35
1,90 < h /h ≤ 3,10
1 2
0,70
3,60 ≤ h /h ≤ 4,20
1 2
5,40 ≤ h /h 0,90
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
10
≥3,0
10
<3,0
≥7,9
≥3,0 10

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 in B, C, L and S systems, if discharged below this
voltage.
NOTE 2 A battery height decrease can occur in B and C systems as discharge continues.
h /h
1 2

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– 12 – 60086-3  IEC:2011
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.
4.8 Marking
4.8.1 General
The designation and the polarity shall be marked on the battery. 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 swallowable batteries shall be given. Refer to IEC 60086-4:2007
(7.2 m) and 9.2) and IEC 60086-5:- (7.1 l) and 9.2) for details.
NOTE 1 Battery marking should not impede electrical contact.
NOTE 2 Examples of the common designations can be found in Annex D of IEC 60086-2.
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.

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60086-3  IEC:2011 – 13 –
Table 5 – Standardised electrochemical systems
Letter Negative Electrolyte Positive el
...