Imagine a world where everything is mobile. Any device you can think of operates without a cable. That is the world we believe in. And that is why we work day after day to reliably and safely provide energy - anywhere, anytime. 

Mobile Energy Supply

Mobility is a trend that exists across all industries. More and more energy is needed in the smallest space. And this is where we come in! We develop, produce and distribute customer-specific solutions in the field of mobile energy supply. This includes in particular battery management systems - the brain of every lithium-ion battery. From intelligent battery electronics to charging units - we develop and produce the right solution for your application.

FSM as electronics partner - benefit from our many years of experience in the develop­ment of customized battery solutions. Due to our modern production facility we have a maximum of flexibility and short lead times, which is why we can react efficiently to the require­ments of our customers. As we strive for a long-term partnership with our customers, a positive and constructive cooperation with them is very important to us.

Our customers value us because we provide them with the following:

  • You have one contact person for all your enquiries.
  • Best product and consulting quality through the combination of years of experience and constant innovation.
  • We adhere to agreed deadlines and do our best to meet urgent special requests.
  • We offer you an all-inclusive package: consulting, develop­ment, production and logistics.


  • Up to 100 cells in series
  • Up to 100 cells in parallel
  • 20 new develop­ments per year
  • 400 realized projects
  • Partnership with Texas Instruments
  • Development of own testing systems
  • Traceability
  • Series production: 50 - 500.000 per product/year
  • Mounting capacity: 40.000 components per hour


A battery is influenced by many factors. Whether it´s the environment that makes certain demands on a battery or an area of application that demands maximum reliability. Through years of experience, we have optimally adapted our features to the require­ments in the following areas:

  • Safety and security
  • Reliability
  • Comfort
  • Resistivity

Learn more about our features


As your electronics partner, we offer you an all-inclusive package, including:

  • Consulting
  • Development
  • Electronics manufacturing

Learn more about our benefits

Battery management system

Battery management systems are a central part of every lithium-ion battery. They protect the battery, make optimum use of the capacity and offer some comfort functions.

Learn more about the functions of a battery management system

Your contact persons

Jörg Wittmer

Jörg Wittmer
For technical questions
Phone +49 7661 9855 140


Konrad Molz

Konrad Molz
Your sales contact
Phone +49 7661 9855 100



Our high quality standards

As part of our ISO 9001 and ISO 14001 certifications, we have a quality and environmental management system for developing, manufacturing, testing, and selling mobile energy supplies, pressure measurement technology, and transformer relays. Our high quality standards define us and differentiate us from the competition. 

To us, quality means:

Excellent workmanship

Long product service life


Safe electronics

Competent customer service

Download ISO-Certificates
REACH Statement

FSM AG is a manufacturer and trader of products, which are products within the meaning of the laws governing chemicals. We primarily buy the products from European suppliers, but in individual cases also from suppliers outside of Europe. According to the requirements of the REACH Regulation, we are therefore not subject to any registration obligations. This also particularly applies, because no chemical substances are released from our products, under normal or sensibly predictable conditions of use (see art. 7 para. 1 the REACH Regulation).

It remains to be said, that the products that you buy from us, are not subject to registration, as products in the sense of the REACH Regulation.

The chemical substances contained in our products, which may be subject to registration, must consequently only be registered by our pre-suppliers.

We are in close contact with the suppliers of relevant products, which are processed in our products, and are informed whether listed SVHC substances above 0.1% volume are contained, in accordance with the REACH Regulation art. 33. Furthermore, we will inform you immediately, in accordance with the REACH Regulation art. 33, if ingredients in our products (from content of > 0.1% volume), are rated as of very high concern by the European Chemicals Agency (ECHA).

From today's point of view, in light of the information from our suppliers, it should not be expected that our products contain SVHC substances, in a volume concentration above 0.1%.


Short Portrait

FSM AG develops an produces intelligent electronics. We support our customers with electronic products in the disciplines mobile energy supply, measuring systems and transformer switching relays as well as in the area of electronic manu­facturing services (EMS). Our products are mostly customized solutions and become part of a final product. Therefore one encounters the technology of FSM quite often without knowing that major components of the final product originate from us.

For further information please refer to our brochure

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