A ground fault circuit interrupting device detects an end-of-life condition. The docking station comprises an engagement element, wherein the engagement element is capable of engaging the said portable electronic device; and a rotation mechanism, wherein the rotation mechanism is capable of rotating said portable electronic device relative to a support base of said docking station. Among the segments 24, at least one of pairs of segments that the brushes simultaneously contact have mutually different pitches. After arrangements of individual semiconductor devices are formed, the lead frame is separated into individual metal plates to form individual semiconductor devices.