Electronic apparatus

An electronic apparatus comprising:

• a fuel cell;
• a first battery including a secondary battery configured to be rechargeable by the fuel cell, all operations of the electronic apparatus being performed by an electric power supplied from at least one of the fuel cell and the first battery;
• a second battery configured to do not perform all the operations of the electronic apparatus but at least supply an electric power to enable detect battery residual quantities of the fuel cell and the batteries and display based on the detection result;
• and
• a battery residual quantity detection unit configured to detect the battery residual quantities of the fuel cell and the first and second batteries, wherein
• on the basis of the battery residual quantities detected by the battery residual quantity detection unit, the presence/absence of execution of a charging operation from the fuel cell to the first battery is determined, and at least one of a designation to supply fuel to the fuel cell and an operation state of the electronic apparatus is displayed on a first display, and
• when the battery residual quantity of at least one of the fuel cell and the first battery is zero, an electric power is supplied from the second battery to the battery residual quantity detection unit to detect the battery residual quantities of the fuel cell and the batteries, and display based on the detection result is performed on a second display.