BATTERY CAPACITY TRACKING METHOD AND APPARATUS, AND ELECTRONIC DEVICE

A battery capacity tracking method and apparatus, and a device are provided. For two batteries connected in series, a first remaining capacity change value corresponding to a first battery (901) when the first battery (901) is switched between a fully charged state and a fully discharged state is obtained (S301); a second remaining capacity change value corresponding to the second battery (902) when the second battery (902) is switched between a fully charged state and a fully discharged state is obtained (S302); and after a remaining capacity change value corresponding to a battery when the battery is switched from one state to another state is obtained, a full charge capacity of the first battery (901) is determined based on the first remaining capacity change value, the second remaining capacity change value, and a full charge capacity of the second battery (902) (S303). The full charge capacity of the second battery (902) may be directly obtained by using an existing coulomb counter chip. According to the battery capacity tracking method and apparatus and the device, the full charging capacities of the two batteries are obtained by using a single coulomb counter chip, to effectively monitor capacities of the two batteries connected in series.