A smart battery device is provided. The smart battery device is applied to an electronic device. The smart battery device provides power for the electronic device. The smart battery device includes a battery pack, a sensing resistor, and a main management chip. The sensing resistor is configured to sense the charging and discharging of the smart battery device. The main management chip is connected to the battery pack, the sensing resistor, and the electronic device. The main management chip is configured to manage the charging and discharging of the smart battery device. When the electronic device is not turned on, if the main management chip detects a leakage event in the electronic device through the sensing resistor, the main management chip will enable the smart battery device to enter a temporary failure state, which will stop the smart battery device from discharging.