An electronic device includes a secondary battery having at least one bare cell, the secondary battery including a charge/discharge switching module for placing the secondary battery in one of a charging state for charging the at least one bare cell or a discharging state for discharging the at least one bare cell; and an analog front end for generating an analog signal based on information of the secondary battery and for transmitting the analog signal out of the secondary battery; and a processor external to the secondary battery for receiving the analog signal from the analog front end and for controlling the charge/discharge switching module in accordance with the analog signal.