I'm guessing the parent post means volumetric energy density, and you're referring to gravimetric energy density. It's frankly inexcusable to not be specific w

I'm guessing the parent post means volumetric energy density, and you're referring to gravimetric energy density. It's frankly inexcusable to not be specific when you're citing an article where both figures are clearly visible. You must have seen it, and consciously chosen to ignore it, causing unnecessary confusion.