In order to provide a power supply control circuit having a low charging loss and low leak electric current regardless of the type of power supply apparatus to allow the charging efficiency to be improved in an electronic apparatus that has a power supply ...

Switching devices (SDs) (S1-S3) fit in a branch of a vehicle's wiring system on a higher voltage level (U2). A measuring device (M1) fits in the main vehicle wiring system on a lower voltage level (U1). The SDs can be switched by relying on the M1, which d...