(Late reply ... too many child boards and topics here! LOL.)

Actually, there are some systems in the works that generate a piezo-electric charge when the wheel spins and even one that generates a piezo current just from the air pressure itself. That last one works on a crystal that exudes electrons when squeezed, but so far it will only tell you that a tire has lost its pressure ... not give you a readout. Neither of these is currently available for use in mass-market cars.

As far as any that charge the internal batteries ... nope.

Mike