The wide temperature range (usually between -40℃ and 65℃) and high power density can ensure the smooth start of tanks, armored vehicles and other high-horsepower military vehicles, especially in the cold winter, and its high power density can also be used as the pulse energy of laser weapons. In the civilian sector, ultracapacitors are also playing a big role. For example, an ultracapacitor can be used to power a camera's flash, which can be used continuously to improve the camera's ability to shoot continuously, and to control the camera's shutter. In addition, with the development of electronics and energy industry, ultracapacitors play an irreplaceable role in short-time UPS systems, solar power systems and other maintenance-free systems. Because ultracapacitors can be charged and discharged at high power levels, ultracapacitors could be used in some vehicles to store braking energy from trains or large buses, providing peak power output during acceleration. Because the charging and discharging speed is very fast, the ultracapacitor can be fully charged instantaneously, and enough to run to the next station, within a short time of the vehicle pulling into the station. This eliminates the need to carry a pantograph on the vehicle, and eliminates the need to erect high-voltage lines along the way, which reduces construction costs. Packing size 57.5*32.5*22.5 (length * width * height unit cm) weight 139320g material collection fluid, activated carbon, electrolyte