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Just make the battery banks container sized and swap them out with fresh ones while doing the main cargo. Then service and charge the old ones.




That also means you can trivially optimize your fuel/cargo ratios. Going across the pacific? Just load 200 more battery containers. Singapore to China right after? Room for 400 FEUs more than normal.

It’s not quite “just”. A way to safely and efficiently connect and disconnect them would be needed.



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