• groet@feddit.org
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    27 天前

    Trolley busses still have batteries, they just get charged by the overhead wires while the bus is driving.

    • sugarfoot00@lemmy.ca
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      27 天前

      Historically they didn’t. But many (certainly not all) modern trolley busses have batteries (or more common, super capacitors) that allow for short distances to be travelled without contact with the lines. It’s certainly not an ‘all’ thing though.

    • F_State
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      27 天前

      They’re more of a backup option. The point being that it’s safer and cheaper than modern high-capacity batteries.