Power supply system with identification code updating capability and method for charging an electronic device

A power supply system with identification code updating capability used for providing a first power, a second power, or a third power to an electronic device having a first identification (ID) code, the power supply system with identification code updating capability comprising:

• a power supply device configured to provide the first power, the second power, or the third power to the electronic device and comprising a memory unit for storing a look-up table, wherein the look-up table comprising at least one second ID code, wherein when the second ID code listed in the look-up table matches with the first ID code, the power supply device performs a full-charging procedure for providing the first power met to a largest rated charged power required by the electronic device to the electronic device, when the second ID code does not match with the first ID code, the power supply device performs a low-power-charging procedure for providing the second power smaller than the first power or a non-charging procedure for providing the third power smaller than the second power to the electronic device, a charging time of the electronic device in the lower-power charging procedure is longer than that of in the full-power-charging procedure, and the third power is used for maintain all of operations of the electronic device but charge;
• and
• an ID code updating module electrically connected to the power supply device;
• wherein when the second ID code listed in the look-up table does not match with the first ID code, the ID code updating module updates the look-up table by adding the first ID code as a new second ID code in the look-up table so that the new second ID code matching with the first ID code, such that the electronic device is charged with the first power;
• wherein the first ID code, the second ID code and the new second ID are vender ID codes.