I get the argument but a fairer comparison would be to count the energy stored with all the battery's life cycles.

You can't reuse a lump of coal to store energy.

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Exactly. The numbers in the graph are correct, but I'm afraid this is not the whole story. I would recommend not jumping to conclusions without further due diligence

This graph is useful for showing howuvh power can be stored per Kilogram. And it does that effectively

So it's effective at not telling the whole story? Got it 😉