本发明的电子机器是对于装备了具有燃料电池单元5,并且具有利用燃料电池单元5的输出来充电之辅助电源7之PDA本体1,经由反复操作输入部3的电源键301,可选择令燃料电池单元5的输出和前述电源部对PDA本体1的输出至少其中一种停止。

A PDA main body (1) is provided with a power supply section having a fuel cell unit (5) and an auxiliary power supply (7) charged by the output from the fuel cell unit (5). For the PDA main body (1), at least stop of the output from the fuel cell unit (5) or stop of the output to the PDA main body (1) from the power supply section can be selected by repeating operation of a power supply key (301) of an input section (3).