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I am too lazy to find a source, but I saw a similar thing a few years ago with an electric mining truck (recover enough energy going downhill loaded to go back uphill unloaded).






Possibly. I feel like I saw something much longer ago. Might have been this one: https://www.popularmechanics.com/technology/infrastructure/a...

I was able to find that they were probably Hitachi trucks, but could not find the source we are likely thinking of.

Fortescue has been testing a mine truck capable of that for a year or two (it was built with liebherr).



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