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comment by briandmyers
briandmyers  ·  3576 days ago  ·  link  ·    ·  parent  ·  post: Map: The Most Common* Job In Every State [Interactive Map]

    If you had told me energy density of batteries would be up by a factor of seven in less than 20 years I wouldn't have believed you. It hadn't gone up by more than 50% since WWII.

And this would not have happened without lithium-based cells. We've now squeezed lithium technology nearly as far as it can go; we may well get vastly better batteries in the future, but if so, it will be (I predict) because we've found a new kind of battery - a revolutionary not evolutionary change.