> Some sources say 3x to 4x the cost of lithium-ion batteries, at least initially. If that's true, that's miraculous. Given the order of magnitude reduction th

> Some sources say 3x to 4x the cost of lithium-ion batteries, at least initially. If that's true, that's miraculous. Given the order of magnitude reduction that will come with economies of scale and commercialisation (as we've experienced with Li-ion), they'll be cheaper than Li-ion in no time.