I’m not following what you say about the weight. You know what is heavy and relatively cheap? Steel. Yet we ship it all around. A Tesla S battery is reported

I’m not following what you say about the weight. You know what is heavy and relatively cheap? Steel. Yet we ship it all around. A Tesla S battery is reported to weight 544kg and costs an estimated 15000 USD. That gives us 0.04 kg/USD. For steel one estimate gives us that 1000kg goes for 1100 USD. Which gives us 0.9 kg/USD. I thought maybe i’m missing your point so I did the same calculation for something light and expensive we are shipping around too. One can buy 0.49kg ipad for 440 USD. Which gives us 0.001 kg/USD. So batteries are somewhere between steel and ipads in terms of kg/$. Can you explain what makes both of those ends shipable while batteries won’t be?