Battery systems
for you

Engineering & Assembly – made in Switzerland

TEFAG Elektronik AG belongs to the international Demmel Group and is a subsidiary of RAWE Electronic GmbH in Allgäu (Germany). Since its foundation in 1993, we have been developing and producing sophisticated electronic assemblies for industry at our company headquarters in Mels (SG). Among other things, we are one of the leading system providers and specialists for intelligent battery applications. We manufacture on behalf of our customers from a wide range of industries, for example dental, hearing aids, medical, sanitary, sensor technology and veterinary.


Our products and services

We are your experienced partner for customized battery packs and electronic assemblies. Our customers receive everything from a single source, from design and development to production. As a specialized service provider for electronics and mobile energy management developments, we have our own production facilities.

Our expertise

TEFAG has its own component assembly and customer-specific battery assembly. We manufacture everything from prototypes to series of over 100,000 units per year. We benefit from long-standing relationships with world-renowned battery cell manufacturers.

Think big!

We are your Swiss specialist for customized battery solutions. Together with our strong partners in the Demmel Group, we offer high-quality systems with complex electronic controls and input systems, including device assembly.

Get in touch


Our diverse reference profile reflects our first-class services. Numerous renowned companies from various industries rely on our expertise and quality. We have realized projects in the fields of metal processing, plastics technology and innovative product design. These references are not only proof of our success, but also confirmation of our commitment to excellence. We pride ourselves on meeting our customers' expectations and look forward to further challenges.

Medicine & Laboratory

Emergency medicine and ambulance

Our range includes battery applications for mobile devices in emergency medicine and ambulance services.

We place our customers and their needs at the center of everything we do.


We are a subsidiary of the German RAWE Electronic GmbH and are part of the internationally active Demmel Group. This employs over 1,400 people worldwide and has further companies in Germany, Italy, the USA, China and Singapore.

Weltkarte Step 1
5 Mio.

Systems in use worldwide


Years system partner


Employees in Mels

Strong together

We use synergies effectively within the Demmel Group. We offer complex systems with decorative elements, mechatronic systems and HMIs with modern battery solutions. We also cover printed electronics and electronic manufacturing services with a high level of testing depth.

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TEFAG Startseite Gebäude

Working at TEFAG

“It is important to us that our employees are not satisfied with what they have achieved. After all, to be successful in the long term, people and organizations need to keep learning. New developments and growing challenges require lifelong learning. More knowledge means more success.”

Werner Suter, Managing Director

Startseite Werner
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