Just adding it here as there nothing much on the www
Vehicle wheels, could also represent those watches like self winding watches.
Caring for your Rolex - Frequently Asked Questions | Rolex®.
As it takes me 8.5 hours charging for 85 kms, why not always in charging mode from multiple sources of magnetic/energy fields.
Which could be available 24/7 plus 365 days.
IMO →
How about charging with earths magnetic field plus solar plus underground electric wires ? Like trains but without contact.
Do post latest technologies you have heard of about Electric Vehicle !