Power supply device and power supply system

A power supply device connectable to a first gaming device and a second gaming device to feed power to a connection device, the connection device being the first gaming device or the second gaming device connected to the power supply device, the power supply device comprising:

• a communication controller configured to transmit and receive data to and from the connection device;
• a determiner configured to determine whether the connection device is the first gaming device or the second gaming device based on data received by the communication controller from the connection device;
• and
• a storage configured to store a first identifier corresponding to the first gaming device and a second identifier corresponding to the second gaming device,
• wherein the communication controller transmits the first identifier or the second identifier to the connection device based on a determination result obtained by the determiner.