Battery manufacturer CustomCells files for insolvency proceedings of key operating entities in Germany
German battery manufacturer CustomCells has filed for insolvency proceedings for the group’s key operating entities located in Itzehoe and Tübingen.
In a press release issued earlier this week, the company said the decision stemmed from the insolvency and payment default of its largest customer, Lilium. It added that despite promising business developments, no new investors with sufficient capital were secured in time to offset these losses, due in part to the current challenging macroeconomic environment.
Coupled with the strained situation affecting other battery industry players, adding further pressure, efforts to avoid insolvency through support from regional, federal and EU institutions ultimately proved unsuccessful.
Dr. Dirk Abendroth, CEO of CustomCells, said: “This decision was not made lightly. Despite our best efforts, outstanding products and strong business development, we are forced to take this step due to external factors beyond our control.
“Our focus is now on maintaining operations as best as possible and creating a viable path forward for the company. We are grateful to our employees, customers, investors, and partners for their trust and support during this challenging time.”
CustomCells is one of the few European players specialising in high-performance, tailor-made battery cells and one of the very few battery manufacturers based in Germany.
The company recently announced the construction of a state-of-the-art pilot facility for innovative cylindrical cells in Tübingen, as part of a large-scale funding initiative aimed at bridging the gap between research and industrial-scale production.
The competent court in Kiel has appointed attorney Dr. Malte Köster, a partner at the law firm WILLMERKÖSTER, as the preliminary insolvency administrator of the operating companies.
Dr. Köster and his team have already begun their work as preliminary insolvency administrators. Employees were informed of the insolvency filing and the next steps in the preliminary proceedings during an all-hands meeting.
Business operations at CustomCells will continue for the time being. Employee wages and salaries are secured through June 2025. In parallel with stabilizing ongoing operations, preparations are underway to restart the investor search process.
The holding company of the CustomCells Group is not affected by the insolvency filing at this time.
In an initial statement, Dr Köster added: “CustomCells is a premium battery manufacturer and one of the pioneers in cutting-edge battery cell technology, with a strong focus on research. The environment for startups in Germany is currently difficult, particularly in the battery sector. Ultimately, the developments at Lilium have significantly impacted CustomCells.
“We are now working to gain a full understanding of the situation and, over the coming days and weeks, will evaluate what restructuring options are available under insolvency protection. At the same time, we will launch a new investor process together with the management team.”

