• ☆ Yσɠƚԋσʂ ☆@lemmy.mlOP
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    1 year ago

    Literally the first paragraph of the article explains that it is 4% of the cost:

    Chinese scientists say they have developed a new solid-state battery technology to match cutting-edge performance at just 4 per cent of the cost.

    You seem to be confusing the cost of materials with the overall cost of production.