In other Viennese news, the oxygen battery. Technically a lanthanum battery, so still rare-earth. You have to read the fineprint in these things.
And it's thrice as inefficient as the usual lithium.
The good news: it wears out in (much) longer than thrice the lifespan. Also it doesn't erupt in eternal flames like your Tesla will. This goes for large installations of power-storage, so links up with those "renewable" sources which, in the greater Germania, means forests.
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