A charging device for a power storage device includes a power conduit configured to deliver current to the power storage device and a detection system configured to be coupled to the power conduit. The detection system includes a current control device coupled to the power conduit and configured to control the current delivered to the power storage device. The detection system also includes a test conductor, a current sensor coupled to the test conductor, and a controller coupled to the current sensor by the test conductor. The current sensor is arranged to detect an amount of current within the test conductor and configured to generate a current measurement signal representative of the current detected. The controller is configured to generate a test signal, transmit the test signal through the test conductor, receive the current measurement signal, and determine a status of the detection system based on the current measurement signal.