This document discusses improving the performance of electric bikes (e-bikes). It begins with an abstract that notes e-bikes can help address environmental pollution and energy crisis issues from conventional vehicles by being more efficient and producing zero emissions. The document then reviews various components that can improve e-bike efficiency, such as lithium-ion batteries, supercapacitors, regenerative braking systems, and flywheels. It analyzes these components and their characteristics. The document concludes that e-bikes have the potential to be a sustainable transportation alternative compared to conventional vehicles.