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I’ve been reading about various breakthroughs in battery world for past decade or so. So far none ended up in a consumer product.
I’ve been reading about battery breakthroughs for decades. And I remember when the latest in battery tech was alkaline, then Ni-Cd, then Li-Ion, and now LiPo. All of those have ended up in consumer products.
You skipped Ni-MH there, that was major for not having the memory problems of Ni-Cd. We still use those in AA and AAA rechargeable batteries.
Ni-MH
iswas also in a lot of hybrid cars.