CHARGING METHODS OF DETACHABLE ELECTRONIC DEVICES

An electronic device includes a first battery, a first charging unit, a first voltage adjustment unit, a power detection module, and a first control module. The first charging unit charges the first battery according to a supply voltage and a first charging enable signal. The first voltage adjustment unit outputs a first output voltage according to the supply voltage and a first battery voltage of the first battery. The power detection module generates a power consumption information according to the first output voltage. The first control module sets a charging time according to the supply voltage and the power consumption information, in which the first control module generates the first charging enable signal to control the first charging unit to charge the first battery according to the charging time.