<p>To enhance the electrical output of triboelectric nanogenerators (TENGs), researchers are increasing their operating speed through complex inner structures or utilizing electric actuators as continuous power sources. However, these strategies conflict with the fundamental advantages of TENGs, which are the simplicity of structure and the ability to harvest mechanical energy without electrical power input. To overcome this contradiction, previous studies proposed spinning disk-based TENGs that can generate ultrafast rotation through a simple structure and straightforward manual input. Although these devices incorporated strong mechanical input from human power into a TENG structure, the electrical output remained insufficient and required improvement. Here, we demonstrate a spinning disk-based TENG that generates an enhanced electrical output through an optimized design and materials. Dynamic analysis showed influence of the system geometry on the mechanical movement using a theoretical model. Parametric studies have evaluated the effects of triboelectric material selection, TENG geometry, and external load resistance on the electrical output while maintaining a consistent mechanical input. The optimized TENG successfully charged a capacitor and continuously powered an engineering calculator using biomechanical input. This study demonstrates the potential of inducing ultrafast movement using a simple TENG structure, effectively powering commercial electronic devices without compromising their structural simplicity.</p>