How does metallo s kryptonite power source work?

Metallo is a DC Comics supervillain who relies on kryptonite to power his partially or fully mechanical body. The character’s concept is that the radioactive element supplies the energy necessary to keep his cyborg chassis functioning. No further technical description of the power system is given in the available evidence, so the exact mechanism of how kryptonite fuels Metallo’s body remains unspecified.