There are four other SI base units, though: the ampere (A) (the base unit of electric current); the kelvin (K) (the base unit of temperature); the candela (cd) (the base unit of luminous intensity, or...There are four other SI base units, though: the ampere (A) (the base unit of electric current); the kelvin (K) (the base unit of temperature); the candela (cd) (the base unit of luminous intensity, or light brightness); and the mole (mol) (the base unit of amount of substance).