FUEL SUPPLY DEVICE, ELECTRONIC EQUIPMENT, AND FUEL SUPPLY SYSTEM CONSTITUTED OF THEM

PROBLEM TO BE SOLVED: To prevent liquid fuel from being supplied to a non-corresponding electronic equipment.SOLUTION: When a user attaches a mobile device (electronic equipment) 100 to a housing part 6 of a fuel supply device 1, a control section 33 carries out communication with a control section 117, and the control section 33 authenticates supply of the fuel/water if the communication can be made. Then, in case concentration of the liquid fuel of the mobile device 100 is detected and the detected concentration has an appropriate value, the control section 33 actuates a fuel supply pump 14, and the fuel in a fuel tank 10 is supplied to the fuel tank 101 of the mobile device 100. During supply of the fuel, the total supply amount of the fuel is acquired by the control section 33, and the control section 33 transmits current date and the total supply amount of the fuel to the control section 117. The control section 117 adds the total supply amount of the fuel to "the remaining amount of the fuel" of a memory section 118, carries out renewal of the memory part 118 taking its sum as "the remaining amount of fuel", and carries out the update of the memory section 118 with the current date as "the latest fuel supply date".