Apparently in the UK, there is also a ...sorry, you cannot view external links. To see them, please REGISTER or LOGINNo Batteries - Ever! No Friction! No Batteries - Ever! No Friction! No Resistance!!
Even if there really was "No Friction!", (which isn't true) , there would still be resistance to motion,
A educational kit for investigating electrical generator in schools and colleges.
And they are wanting (UK) schools to teach that powering the lights requires no resistance??? RD, perhaps you should write a letter to them and set them straight.
Friction, however, is considered a "contact force". So, other than some wind resistance components, the induction magnets would be non-contact, and thus no friction.
I have, however, used the old tire generators, about 6 watts, what a pain to pedal.
The LEDs, of course, use minimal power, especially if only on for a fraction of the time. I have tried the ...sorry, you cannot view external links. To see them, please REGISTER or LOGIN, and the resistance is hardly noticeable. A (relatively) heavy tire with good bearings can spin quite a while wile generating sufficient power to make the lights blink.
One of the Reelights does use a capacitor (I think) to allow the lights to continue flashing while a person is stopped briefly.