Design Background Being environmentally friendly is the issue when it comes to the limitation of resources and energies for those in urban in the future. Riding bikes offers a short-distance travel, especially for short-ranged commuters, which is the policy being promoted all around the globe. Design Concept It starts as a mobile power bank, combined with the rotation of the bike, driven to generate electricity. By using " electromagnetic induction" to convert kinetic energy into electrical energy, " Electromagnetic induction" not only converts and keeps it but also takes more efficient use of all energy. Design demands 1. Easy to carry 2. Easy to install 3. Easy to use