EZGO 18488G1 Silicon Rectifier Diode-No Hardware Can be replacement item for part number 28548G01 but requires 2 each of 18488G1 for each 28548G01. Regulates and maintains the electrical power to the charger in order to provide power to the vehicle Replacement of a diode is necessary for the operation of the charger should the diode burn out or experience a voltage spike