A portable electronic apparatus having a detachable battery and an optional component for expanding a function.

摘要

A potable computer (1) comprises a base unit to which a keyboard (7) and a display unit (3) are attached. A first and second batteries (68) (100), functioning as a drive power source, and an optional component (101) are attached to the base unit (2). The optional component (101) is used to expand a function of a modem device to be connected to a telephone line when using and that of an add-in memory. In the base unit (2), there is formed a first mounting recess (60) to which the first battery (68) is detachably attached, and a second mounting recess (61) to which the the second battery (100) or the optional component (101) is selectively detachably attached.