An equipment module switches between series and parallel connections of a first battery and a second battery. The equipment module includes a series relay and a parallel relay. The series relay selectively forms a series electrical path between the first battery and the second battery using a series fixed terminal and a series movable terminal. A series rod extends through the series movable terminal and guides movement between contact and separation. The parallel relay selectively forms a parallel electrical path between the first battery and the second battery using a parallel fixed terminal and a parallel movable terminal. The parallel fixed terminal is electrically connected to a current path different from a current path connected to the series fixed terminal. A parallel rod extends through the parallel movable terminal and guides movement of the parallel movable terminal. The series rod and the parallel rod extend in different directions.