What is IEC 60086-3 about?
IEC 60086-3 discusses watch batteries. 60086-3 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.
Who is IEC 60086-3 for?
IEC 60086-3 on watch batteries is applicable to:
- Battery manufacturers and importers
- Watch designers
- End users
Why should you use IEC 60086-3?
IEC 60086-3 provides specific requirements and information for primary watch batteries that are beneficial for primary battery users, watch designers, and battery manufacturers by ensuring the best compatibility between batteries and watches.
IEC 60086-3 will remain under continual scrutiny to ensure that the publication is kept up to date with the advances in both battery and watch technologies.
What’s changed since the last update?
BS EN IEC 60086-3:2021 supersedes BS EN 60086‑3:2016, which is withdrawn.
BS EN IEC 60086-3:2021 includes the following significant technical changes with respect to the BSEN 60086‑3:2016:
- Reformatted Table 1 and Table 2. The reformatted tables are now divided by system. Dimensional tolerances were changed when appropriate. Cell sizes were removed or added based on the size prevalence in the marketplace
- In Table 3 the minimum values of l1 were reformatted
- The minimum OCV for the S system in Table 5 was changed to 1,55 V

