How is metallo powered by kryptonite?

All versions of the DC Comics character Metallo are powered by kryptonite. The character’s body, whether it is a partially or completely mechanical construct, contains a kryptonite core or energy source that drives the machinery and sustains the villain’s abilities. In the comics, this kryptonite acts as a power supply, enabling Metallo to maintain his strength, durability and various technological weapons. The reliance on kryptonite is a direct link to the Superman mythos, making Metallo a recurring adversary of the Man of Steel.