MT 15 - TC 35/MT 15

IEC 60086-4:2025 specifies tests and requirements for primary lithium batteries to ensure their safe operation under intended use and reasonably foreseeable misuse.
This sixth edition cancels and replaces the fifth edition published in 2019. This edition includes the following significant technical changes with respect to the previous edition:
- Added definitions for leakage and venting, in addition to the test criteria;
- Revised overdischarge test;
- Revised marking requirements;
- Revised criteria for the child resistant packaging test;
- Changed the purpose of Annex F from "informative" to "normative";
- Added a new Annex G with additional measures against misuse of batteries not intended for consumer replacement;
- Integrated the contents of Interpretation Sheet 1 (IEC 60086-4:2019/ISH1:2020);
- In Clause 3, terms were reordered according their functions: basic terms, electrochemical systems, battery shapes, battery sizes, electrical characteristics, specifications, safety aspects, failure modes;
- In 6.4.4, the exemption for the shock acceleration for lithium primary batteries was reduced from 12 kg to 4,482 kg in order to reflect the fact that this is the threshold in IEC 62281, Test T-4, where the peak acceleration decreases below 150 gn.

IEC 60086-4:2019 specifies tests and requirements for primary lithium batteries to ensure their safe operation under intended use and reasonably foreseeable misuse. NOTE Primary lithium batteries that are standardized in IEC 60086-2 are expected to meet all applicable requirements herein. It is understood that consideration of this part of IEC 60086 might also be given to measuring and/or ensuring the safety of non-standardized primary lithium batteries. In either case, no claim or warranty is made that compliance or non-compliance with this standard will fulfil or not fulfil any of the user’s particular purposes or needs. This fifth edition cancels and replaces the fourth edition published in 2014. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) Revised criteria for an explosion;
b) Addition of test parameters for the overdischarge test of battery types FR14505 and FR10G445;
c) Addition of a new subclause 5.1 Validity of Testing;
d) revised pictogram E in Table D.1;
e) Addition of Annex E with requirements for child resistant packaging of coin cells;
f) Addition of Annex F with recommendations on the use of the KEEP OUT OF REACH OF CHILDREN safety sign.
Keywords: lithium batteries
The contents of the corrigendum of October 2019 and April 2020 and the Interpretation sheet of May 2020 have been included in this copy.

IEC 60086-4:2014 specifies tests and requirements for primary lithium batteries to ensure their safe operation under intended use and reasonably foreseeable misuse. This fourth edition cancels and replaces the third edition published in 2007. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- Harmonisation with the second edition of IEC 62281;
- Alternative protective circuits in 7.1.1;
- More information regarding risks of swallowing lithium batteries in (former) 7.2.m) and promotion of this item to 7.2a);
- A new Annex D with pictograms for some of the safety precautions in 7.2. Keywords: lithium batteries

Specifies tests and requirements for primary lithium batteries to ensure their safe operation under intended use and reasonably foreseeable misuse. The major technical changes, with regard to the previous edition, concern the harmonisation with IEC 62281.