CART POWER SUPPLY DEVICE

A cart power supply device includes a power supply resonance circuit, a notification element, a current detection circuit, and a control circuit. The power supply resonance circuit includes a power supply coil that can be electromagnetically coupled to a power reception coil mounted on a shopping cart or the like. The current detection circuit detects a current flowing through the power supply resonance circuit. The control circuit supplies an alternating current to the power supply resonance circuit at a first level and operates the notification element in a first mode when the detected current is less than a first threshold. The control circuit supplies the alternating current at a second level when the detected current is greater than the first threshold and operates the notification element in a second mode.