What do you think of Mullen’s EMM/evercharge?

To me it sounds like snake oil. Free energy.

“Global EV Technology’s electrical energy management module is the only regenerative energy source that can recharge EVBs even while sitting cold and unplugged from chargers. The Ever-Charge™ Technology can continually power up itself once attached to any battery.”

I’m an electrical engineer, and I’d love to know how their “phone-sized” device can recharge batteries while the vehicle is sitting still and unplugged from the grid.