Amazing spraying gun stack capacitor is suitable for electrostatic spraying doubler module circuit application and typical handheld high-voltage electrostatic spray gun, the built-in high voltage module, low and high pressure anion generator in high voltage power supply components. Static electricity generating circuit, spraying machines, electrostatic flocking equipment, doubler circuit, high frequency doubler rectifier circuit, a major part of the multistage doubler rectifier circuit, low power dc high voltage power supply, etc.