There are also devices that create DC electrical current from hot gas streams, kinda like a thermocouple “on steroids”, that can boost battery charge for later acceleration or hill climbing. I read science abstracts announcing improvements in these devices at least twice a year. They are still searching for a “home run.”

In my younger years I learned to hate hearing: Gotta buy another $27,000 turbo for the 992 front end loader (when Gold was $290 per Troy ounce)

Will my “golden years” produce a similar: Gotta buy another $27,000 lithium battery pack for the Tesla Power Wall? (when Gold is $2900 per Troy ounce)