Power supply

  • Testing powerbanks for everyday use: 10 models, one surprising winner

    Guide

    by Lorenz Keller

  • A different price every 15 minutes: I’m buzzing to try out these new electricity tariffs

    Background information

    by Martin Jungfer

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

    Guide

    by Lorenz Keller

  • With these tips, your car battery won't go flat in winter

    Guide

    by Lars Petersen

  • Here’s why batteries have strange designations like CR2032

    Background information

    by Martin Jungfer

Popular threads in Power supply

Go to Forum