from Hacker News

Australian ‘Infinity Train’ uses gravity to recharge batteries

by SamCritch on 3/4/22, 5:46 PM with 3 comments

• by dailybagel on 3/4/22, 5:56 PM

  > The gravitational energy from the heavy iron ore load will be used to regenerate the batteries while the train is running.

  "Infinity train" may be a bit of a misnomer: this is viable as long as there is ore (or other mass) at the higher elevation, which can be transported on the train to a lower elevation -- in the process, the train captures some of the gravitational potential energy that was present.