随时随地充电 / charging anywhere

It is so unconvenient for cyclists who always travel by bike outside for a long time without enough power at hand.Only when they get rest in hotels or some other public service centers can they get their elcctric equipments charged. This design is different from the traditional way to charge.It is based on the principle of electromagnetic induction which can save energy through the wheel’s rotation to generate electricity.When cyclists need to charge ,they just need to take out the power bank.Wherever they are,they can get enough power.