A battery temperature adjustment apparatus comprising: a battery capable of being charged with power supplied from an external power source; a temperature adjustment section configured to operate by power supplied from the external power source or the battery and adjust a temperature of the battery by heating or cooling; a detection section configured to detect a temperature of the battery; and a control section configured to control an operation of the temperature adjustment section such that a temperature of the battery falls in a predetermined temperature range, based on the temperature of the battery detected by the detection section, wherein the control section is configured to: change an operating condition or a target value of an output parameter of the temperature adjustment section according to whether or not the external power source to supply power to the battery is electrically connected, wherein the control section is further configured to: in a case where the external power source is not electrically connected, change the operating condition or the target value of an output parameter of the temperature adjusting section so as to reduce power consumed in the battery as compared to a case where the external power source is electrically connected, and in a case where the external power source is electrically connected, change the operating condition or a target value of an output parameter of the temperature adjustment section according to whether or not the battery is during charging, and in a case where the battery is during charging, change the operating condition or a target value of an output parameter of the temperature adjustment section according to whether a form of the charging is quick charging or normal charging. a battery capable of being charged with power supplied from an external power source; a temperature adjustment section configured to operate by power supplied from the external power source or the battery and adjust a temperature of the battery by heating or cooling; a detection section configured to detect a temperature of the battery; and a control section configured to control an operation of the temperature adjustment section such that a temperature of the battery falls in a predetermined temperature range, based on the temperature of the battery detected by the detection section, wherein the control section is configured to: change an operating condition or a target value of an output parameter of the temperature adjustment section according to whether or not the external power source to supply power to the battery is electrically connected, wherein the control section is further configured to: in a case where the external power source is not electrically connected, change the operating condition or the target value of an output parameter of the temperature adjusting section so as to reduce power consumed in the battery as compared to a case where the external power source is electrically connected, and in a case where the external power source is electrically connected, change the operating condition or a target value of an output parameter of the temperature adjustment section according to whether or not the battery is during charging, and in a case where the external power source is not electrically connected, change the operating condition or the target value of an output parameter of the temperature adjusting section so as to reduce power consumed in the battery as compared to a case where the external power source is electrically connected, and in a case where the external power source is electrically connected, change the operating condition or a target value of an output parameter of the temperature adjustment section according to whether or not the battery is during charging, and in a case where the battery is during charging, change the operating condition or a target value of an output parameter of the temperature adjustment section according to whether a form of the charging is quick charging or normal charging.