Super capacitor has a very wide range of uses. Combined with high energy density materials such as fuel cells, Supercap provides fast energy release to meet high power requirements, so that fuel cells can be used only as energy sources. At present, the energy density of Super capacitor/ultra capacitor can reach as high as 20 kW/kg and has begun to occupy the market between traditional capacitors and batteries. https://www.kamcappower.com/products/