Battery capacity tracking method and apparatus, and electronic device

A method for tracking battery capacity of an electronic device, the method comprising:

• obtaining a third remaining capacity change value of a first battery of the electronic device when the first battery is switched from a fully charged state to a fully discharged state;
• obtaining a fourth remaining capacity change value of a second battery of the electronic device when the second battery is switched from a fully charged state to a fully discharged state;
• and
• obtaining a full charge capacity of the first battery by dividing a product of a full charge capacity of the second battery and the fourth remaining capacity change value by the third remaining capacity change value.

An electronic device, comprising:

• a first battery and a second battery connected in series to supply power to the electronic device;
• a charging integrated circuit having an input end configured to be connected to a charging adapter to charge the first battery and the second battery;
• a coulomb counter chip connected to the second battery in parallel, and configured to:
• monitor a remaining capacity and a full charge capacity of the second battery, and
• send the remaining capacity and the full charge capacity to the controller;
• and
• a controller configured to:
• obtain a first remaining capacity change value of the first battery when the first battery is switched between a fully charged state and a fully discharged state,
• obtain a second remaining capacity change value of the second battery when the second battery is switched between a fully charged state and a fully discharged state, and
• determine a full charge capacity of the first battery based on the first remaining capacity change value, the second remaining capacity change value, and the full charge capacity of the second battery.