A semiconductor device including: a voltage detection section that outputs a first voltage and a second voltage that is different from the first voltage, the first voltage and the second voltage being voltages of a connected battery; a correction section that, on the basis of potential differences between the first voltage and second voltage, derives second data from first data, the first data representing a relationship between remaining battery levels and open circuit voltages, and the second data representing a relationship between remaining battery levels and battery voltages; and a calculation section that calculates a remaining level of the battery on the basis of a remaining battery level corresponding to a minimum voltage in the second data and outputs the calculated remaining level of the battery.