Leclanché Restarts M3 Module Production Line Following Incident

YVERDON-LES-BAINS, Switzerland, 5^th of January 2026 – Leclanché SA, one of the world’s leading energy storage companies, announces the restart of its M3 module production line in Yverdon-les-Bains following the incident reported on the 26^th of November 2025.

After a couple of weeks of testing and validation, modules have been successfully produced in test mode before the Christmas break. Following this test period, standard production has resumed as
of Monday 5^th of January 2026 under adapted operating conditions until the equipment damaged during the incident is fully replaced. The adapted operating conditions are to take in to account offline quality testing while the inline testing station is being repaired.  None of the assembly process steps have been modified or degraded, so we maintain full product compliance and full production
capacity on the key assembly steps.

Production operations will continue during the full replacement period with a gradual ramp-up planned over the coming weeks.  We expect to reach close to full production capacity in this mode, and full production capacity is expected to be restored once the new equipment is installed.

The supply disruption to clients following the incident has been minimal, and with the restart of module production, we will be able to maintain the supply of goods to our customers, including battery pack assembly in Germany.

Pierre Blanc, Group CEO & CTIO of Leclanché said: “I would like to sincerely thank our engineering, EHS, and production teams for their exceptional commitment and responsiveness, as well as our suppliers for their valuable support during the assessment and recovery phase. Their collective efforts have been instrumental in enabling the safe and timely restart of the line.”

Leclanché will continue to provide updates should new material information become available.

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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).

SIX Swiss Exchange : ticker symbol LECN | ISIN CH 011 030 311 9

Disclaimer

This press release contains certain forward-looking statements relating to Leclanché's business, which can be identified by terminology such as "strategic", "proposes", "to introduce", "will", "planned", "expected", "commitment", "expects", "set", "preparing", "plans", "estimates", "aims", "would", "potential", "awaiting", "estimated", "proposal", or similar expressions, or by expressed or implied discussions regarding the ramp up of Leclanché's production capacity, potential applications for existing products, or regarding potential future revenues from any such products, or potential future sales or earnings of Leclanché or any of its business units. You should not place undue reliance on these statements. Such forward-looking statements reflect the current views of Leclanché regarding future events, and involve known and unknown risks, uncertainties and other factors that may cause actual results to be materially different from any future results, performance or achievements expressed or implied by such statements. There can be no guarantee that Leclanché's products will achieve any particular revenue levels. Nor can there be any guarantee that Leclanché, or any of the business units, will achieve any particular financial results.

Media contacts: 

Switzerland / Europe: 
Thierry Meyer
T: +41 (0) 79 785 35 81
E-Mail: tme@dynamicsgroup.ch

Germany:
Christoph Miller
T: +49 (0) 711 947 670
E-Mail: leclanche@sympra.de

Investor contacts:
Pierre Blanc
T: +41 (0) 24 424 65 00
E-Mail: invest.leclanche@leclanche.com