CAT's CEO said on today's Bernstein webcast that a fully loaded mining truck will exhaust its battery power in 90 minutes. So, the answer to your question is "dynamic recharging" via a a mini-grid, which is something that CAT itself supplies.
“The efficient-market hypothesis may be the foremost piece of B.S. ever promulgated in any area of human knowledge!”
Register for free to join our community of investors and share your ideas. You will also get access to streaming quotes, interactive charts, trades, portfolio, live options flow and more tools.