Agreements Concerning Strategic Partnership between Leclanché and Pinnacle International Venture Capital Limited have Ended

Leclanché SA / Key word(s): Agreement Agreements Concerning Strategic Partnership between Leclanché and Pinnacle International Venture Capital Limited have Ended 07-Nov-2025 / 23:28 CET/CEST Release of an ad hoc announcement pursuant to Art. 53 LR The issuer is solely responsible for the content of this announcement.  Ad hoc announcement pursuant to Art. 53 LR

Agreements Concerning Strategic Partnership between Leclanché and Pinnacle International Venture Capital Limited have Ended

• The agreements with Pinnacle International Venture Capital Limited concerning a strategic partnership have ended

 YVERDON-LES-BAINS, Switzerland, 7 November, 2025 – Leclanché SA ("Leclanché" or "Company"), one of the world’s leading energy storage companies, announces today that the term sheet dated 27 June 2024, the framework agreement dated 18 July 2024 and the side letter dated 6 February 2025 (together the "Agreements") with Pinnacle International Venture Capital Limited ("Pinnacle"), a private equity firm based in London, United Kingdom, concerning a strategic partnership have ended.

As announced by Leclanché in its ad hoc announcement of 27 June 2024, Pinnacle and Leclanché intended to enter into a strategic partnership, with Pinnacle contributing substantial funds to unlock the strategic growth of Leclanché. Following completion of financial, technical, and legal due diligence, as well as an engineering review, and despite repeated requests from Leclanché, Pinnacle did not provide the final investment amount or the detailed investment structure (see our ad hoc announcement of 7 February 2025) or confirm the originally agreed upon investment (as set forth in the framework agreement), which is why the Agreements have terminated. Leclanché informed Pinnacle today that the Agreements ended and are no longer in place.

Likewise, the option agreement dated 17 July 2024 between Pinnacle and SEF-LUX^[1], granting Pinnacle – in connection with the Agreements – the option to acquire a portion of Leclanché shares from Leclanché's majority shareholder, SEF-LUX, also ended.

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About Leclanché

Leclanché is a world leading provider of low-carbon footprint energy storage solutions based on lithium-ion cell technology. Established in 1909 in Yverdon-les-Bains, Switzerland, Leclanché’s history and heritage is rooted in battery and energy storage innovation. The company’s Swiss culture for precision and quality, together with its production facilities in Germany, make Leclanché the partner of choice for companies seeking the very best in battery performance and who are pioneering positive changes in how energy is produced, distributed and consumed around the world. Leclanché is organised into three business units: energy storage solutions, e-Mobility solutions and specialty battery systems. The company currently employs over 350 people with representative offices in eight countries around the world. Leclanché is listed on the Swiss Stock Exchange (SIX: LECN).