Power supply

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    by Lorenz Keller

  • New rules at Swiss and Lufthansa: flying with power banks is becoming more cumbersome

    News + Trends

    by Lorenz Keller

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

    Guide

    by Lorenz Keller

  • The best-looking charger on the market

    Product test

    by Lorenz Keller

  • Here’s why batteries have strange designations like CR2032

    Background information

    by Martin Jungfer

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