One aspect includes an apparatus, including: a storage part having a storage hole defined therein to store a pen-type input device by insertion; and a power-supplying terminal within the storage hole that moves toward and away from the pen-type input device from a side part of the storage hole; wherein, the power-supplying terminal moves outwardly from the side of the side part of the storage hold during the insertion of the pen-type input device into the storage hole; and wherein the power-supplying terminal moves inwardly and away from a side of the pen-type input device during extraction of the pen-type input device from the storage hole. Other embodiments are described and claimed.