A battery pack includes a plurality of battery modules, a battery module of the plurality of batter modules including at least one cell and a control circuit configured to manage the at least one cell, a main controller configured to wirelessly communicate with the control circuit, and a plurality of structures corresponding to the plurality of battery modules, a structure of the plurality of structures is configured to adjust signal intensity of a radio signal transmitted to the main controller from the control circuit of the battery module, wherein the structure is further configured to vary a degree of adjusting signal intensity of the radio signal according to a position of the battery module.