This demonstration device is a "visible and tangible" supercapacitor energy storage system demo designed specifically for teaching, exhibitions, and research and development verification. Through the triple visual interface of LED light column, OLED screen, and mobile app, the core advantages of "charging and discharging in seconds" of supercapacitors can be intuitively displayed within 30 seconds, helping users quickly understand the energy storage principle, capacity calculation, and life evaluation of capacitors. Reserved lithium battery comparison slot, which can simultaneously compare the power density, energy density, and temperature curve of "capacitor vs battery". Application scenario: High school/university physics and electrochemistry classroom: Complete the "Energy Storage Concept" experiment in 10 minutes.