IEC 62902:2025

IEC 62902 ®
Edition 2.0 2025-02
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Secondary cells and batteries – Marking symbols for identification of their
chemistry
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IEC 62902 ®
Edition 2.0 2025-02
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Secondary cells and batteries – Marking symbols for identification of their
chemistry
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.220.20; 29.220.30 ISBN 978-2-8327-0287-1

– 2 – IEC 62902:2025 RLV © IEC 2025
CONTENTS
FOREWORD . 4
INTRODUCTION . 2
1 Scope . 9
2 Normative references . 9
3 Terms and definitions . 10
4 Application of markings . 10
4.1 General . 12
4.2 Marking of electrochemical battery systems . 12
4.3 Marking requirements for additional chemistry information of Li-ion batteries . 13
4.4 Application of the markings on the battery . 13
5 Markings. 13
5.1 Markings without recycling symbol . 13
5.1.1 General . 13
5.1.2 Lead acid batteries . 14
5.1.3 Nickel cadmium batteries . 14
5.1.4 Nickel metal hydride batteries . 14
5.1.5 Lithium ion batteries . 14
5.1.6 Lithium metal batteries . 14
5.2 Optional markings with recycling symbol . 14
5.2.1 General . 14
5.2.2 Lead acid batteries . 15
5.2.3 Nickel cadmium batteries . 15
5.2.4 Nickel metal hydride batteries . 15
5.2.5 Lithium ion batteries . 16
5.2.6 Lithium metal batteries . 16
5.3 Background colours . 16
5.4 Design of markings and symbols . 16
5.4.1 General . 17
5.4.2 Dimensions for symbols . 17
5.4.3 Dimensions for markings without recycling symbol . 17
5.4.4 Dimensions for markings with recycling symbol . 18
5.4.5 Adaptive size . 19
5.4.6 Design of the recycling symbol . 19
5.4.7 Design of the letters (characters) . 19
5.4.8 Exception for marking with a single colour . 20
6 Durability of markings with respect to chemical agents . 20
6.1 General . 20
6.2 Test procedure . 21
6.2.1 General . 21
6.2.2 Test with water and recommended cleaning agents . 21
6.2.3 Test with electrolyte . 21
6.2.4 Test with neutralizing solutions . 21
6.3 Criteria . 21
Annex A (informative) Colours for background . 22
A.1 General . 22
A.2 Colour definition for background . 22

Annex B (informative) Calculation method for the battery volume . 23
Bibliography . 24

Figure 1 – Example of marking for lead acid batteries . 14
Figure 2 – Example of marking for nickel cadmium batteries . 14
Figure 3 – Example of marking for nickel metal hydride batteries . 14
Figure 4 – Example of marking for lithium ion batteries . 14
Figure 5 – Example of marking for lithium metal batteries . 14
Figure 6 – Example of marking with recycling symbol for lead acid batteries . 15
Figure 7 – Example of marking with recycling symbol for nickel cadmium batteries . 15
Figure 8 – Example of marking with recycling symbol for nickel metal hydride batteries . 15
Figure 9 – Example of marking with recycling symbol for lithium ion batteries . 16
Figure 10 – Example of marking with recycling symbol for lithium metal batteries . 16
Figure 11 – Size of marking without recycling symbol . 17
Figure 12 – Size of marking with recycling symbol . 18
Figure 13 – Design of recycling symbol . 19
Figure 14 – Design of letters . 19
Figure 15 – Examples for markings with frames of a contrasting colour . 20

Table 1 – Recycling and ecolabels regarding batteries . 7
Table 2 – List of dimensions for symbols . 17
Table 3 – Test matrix for durability test of markings . 20
Table A.1 – Colour references . 22

– 4 – IEC 62902:2025 RLV © IEC 2025
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SECONDARY CELLS AND BATTERIES –
MARKING SYMBOLS FOR IDENTIFICATION OF THEIR CHEMISTRY

FOREWORD
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