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Battery costs have declined by 99% in the last three decades, making electrified transport a reality
(ourworldindata.org)
This is a most excellent place for technology news and articles.
It's not just cars. Electric cars became somewhat widespread before electric scooters. Those are awesome for getting around town quickly and are only feasible because of how cheap batteries have gotten. Cars could hide the battery cost easier than scooters, which you expect to be cheap.
And of course other forms of electric mobility too.