A portable communication device comprising: a battery pack (195; 296; 400; 1011; 1511; 1730); a power management integrated circuit, PMIC, connected to the battery pack; a power dissipation element (196; 292; 450; 1040) disposed outside and apart from a housing of the battery pack, the power dissipation element being designed to have lower resistance than internal resistance of the power management integrated circuit and internal resistance of the battery pack; a detecting circuit (293; 440) configured to detect a state of the battery pack; at least one first switch (434; 1030; 1570) connected to the battery pack and the detecting circuit; and at least one second switch (431, 432) disposed inside the housing of the battery pack (195; 296; 400; 1011; 1511; 1730) and configured to selectively connect the battery pack and the power management integrated circuit with each other, wherein the detecting circuit is configured to control the at least one first switch to: electrically disconnect the power dissipation element from the battery pack when the state of the battery pack does not satisfy a specified condition; and electrically connect the power dissipation element to the battery pack when the state of the battery pack satisfies the specified condition, wherein the detecting circuit is configured to detect at least one of a voltage applied between a positive electrode and a negative electrode of the battery pack, a temperature of the battery pack, or a gas concentration around the battery pack, and control the at least one first switch to be turned on to supply power to the power dissipation element from the battery pack when at least one of the voltage, the temperature, or the gas concentration, falls within a specified range. a battery pack (195; 296; 400; 1011; 1511; 1730); a power management integrated circuit, PMIC, connected to the battery pack; a power dissipation element (196; 292; 450; 1040) disposed outside and apart from a housing of the battery pack, the power dissipation element being designed to have lower resistance than internal resistance of the power management integrated circuit and internal resistance of the battery pack; a detecting circuit (293; 440) configured to detect a state of the battery pack; at least one first switch (434; 1030; 1570) connected to the battery pack and the detecting circuit; and at least one second switch (431, 432) disposed inside the housing of the battery pack (195; 296; 400; 1011; 1511; 1730) and configured to selectively connect the battery pack and the power management integrated circuit with each other, wherein the detecting circuit is configured to control the at least one first switch to: electrically disconnect the power dissipation element from the battery pack when the state of the battery pack does not satisfy a specified condition; and electrically connect the power dissipation element to the battery pack when the state of the battery pack satisfies the specified condition, wherein the detecting circuit is configured to detect at least one of a voltage applied between a positive electrode and a negative electrode of the battery pack, a temperature of the battery pack, or a gas concentration around the battery pack, and control the at least one first switch to be turned on to supply power to the power dissipation element from the battery pack when at least one of the voltage, the temperature, or the gas concentration, falls within a specified range.