Sendung mit der Maus - how does an LED work?

How does a LED light work? Christoph has his new flashlight burned all night. The next day she still burns. How does the battery last so long? Christoph gets to the bottom of the matter.

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Success story of Truma

Almost every camper in Europe knows Truma. We have been marketing accessories for caravans and motor homes since Philipp Kreis established the company in 1949. In over 65 years, Truma has developed into a successful international company that is still family-owned. Back then, it all started with a