A charging method includes first and second charging steps to charge a lithium-ion battery. In the first charging step, a temperature rise gradient of the battery is detected. A battery temperature when the battery is charged to a first predetermined capacity is predicted based on the detected gradient. A charging current is controlled based on the predicted temperature. The battery is charged, at a current that results in a battery temperature that is lower than a predetermined temperature, to the first predetermined capacity. In the second charging step, a temperature rise gradient of the battery is detected. A battery temperature when the battery is charged to a second predetermined capacity is predicted based on the gradient. A charging current is controlled based on the predicted temperature. The battery is charged, at a current that results in a temperature of the battery that is lower than the predetermined temperature, to the second predetermined capacity.