Good points. The laws of physics do still apply And so do the probabilities of bicycle theftCool, interesting design!
I still think that even though there is no physical friction, this will rob you of a few watts. Aerodynamic drag will rob you of the most power, but the harvesting of kinetic energy using magnets will still exert an effect on the wheel – you cannot generate energy with magnets without the magnets also exerting an equal slowing effect upon the spinning aluminum rim.
The bigger problem with this product, though, is that it'll get stolen off your bike super quick when parked. Not that other lights are much safer, but if you have an integrated light that's drawing from your main battery, it's harder to steal since it's wired in (granted, that cable can be cut very easily).
There is if you know how to use it.The name is misleading. There is no free lunch with energy.
Agreed, and the point of it only puts out a watt or 2, AND needs a battery "back-up" I do not see the point. Throw away batteries are quite cheap, in fact I'd rather an E-bike have a battery light system than intragrated, simply because it means less wires, and because LED lights are so efficient, that a cheap throw away battery will last a long, long timeThe name is misleading. There is no free lunch with energy.