• SlopppyEngineer@lemmy.world
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    4 days ago

    Yes, size is the big issue. And that’s linked to power density. In the video they say normal battery has 200-400 Wh/kg and these superscapacitors get 7-11 Wh/kg.

    That means your phone that lasts a day with the same size in superscapacitors now only lasts an hour. Or the range of an EV goes from 500 miles to 20 miles.