Power supply

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    by Lorenz Keller

  • Mignon, R6, CR2032: why batteries are called what they’re called

    Background information

    by Martin Jungfer

  • Charging without a cable: why the best iPhone charger isn’t made by Apple

    Guide

    by Lorenz Keller

  • The Sharge Pixel Charger proves how stylish charging can be

    Product test

    by Lorenz Keller

  • Dynamic electricity tariffs: the risk is manageable with an EMS

    Background information

    by Martin Jungfer

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