In this new generation bicycle light system, no battery is needed, no friction on any parts of the bicycle. The lights flash regardless speed of the bicycle and weather conditions (unlike normal dynamos!). Very bright.
It can be used as a stand-alone light system (as a normal dynamo) on your bike, or used as a back-up for your existed battery-powered lights
All details and buy on-line:
No friction, per se, but reaction dynamics from the electromagnetic induction coil. Just basic physics (see Lenz's Law and others). No perpetual energy and no free lunches in this universe.
...nd no generator lights that don't require additional pedaling effort.
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