A cleaner comprising: a battery housing; a main body terminal that is disposed in the battery housing; and a battery that is separably coupled to the battery housing, wherein the battery includes: a plurality of battery cells; a battery management unit that is configured to manage voltage of the battery cells; and a battery terminal that is connected to the battery management unit and is connected to the main body terminal when the battery is inserted into the battery housing, wherein the battery terminal includes: a first clip terminal that is elastically deformable and has a first contact portion; and a second clip terminal that is elastically deformable and has a second contact portion, and the main body terminal is in contact with the first contact portion and the second contact portion between the first contact portion and the second contact portion, characterized in that: the battery further includes a battery holder that allows the battery cells to be arranged in erected positions and in a plurality of rows; and the first contact portion and the second contact portion of the battery terminal are spaced apart from each other in parallel with a coupling direction of the battery terminal and the main body terminal. a battery housing; a main body terminal that is disposed in the battery housing; and a battery that is separably coupled to the battery housing, wherein the battery includes: a plurality of battery cells; a battery management unit that is configured to manage voltage of the battery cells; and a battery terminal that is connected to the battery management unit and is connected to the main body terminal when the battery is inserted into the battery housing, wherein the battery terminal includes: a first clip terminal that is elastically deformable and has a first contact portion; and a second clip terminal that is elastically deformable and has a second contact portion, and the main body terminal is in contact with the first contact portion and the second contact portion between the first contact portion and the second contact portion, a plurality of battery cells; a battery management unit that is configured to manage voltage of the battery cells; and a battery terminal that is connected to the battery management unit and is connected to the main body terminal when the battery is inserted into the battery housing, wherein the battery terminal includes: a first clip terminal that is elastically deformable and has a first contact portion; and a second clip terminal that is elastically deformable and has a second contact portion, and the main body terminal is in contact with the first contact portion and the second contact portion between the first contact portion and the second contact portion, a first clip terminal that is elastically deformable and has a first contact portion; and a second clip terminal that is elastically deformable and has a second contact portion, and the main body terminal is in contact with the first contact portion and the second contact portion between the first contact portion and the second contact portion, characterized in that: the battery further includes a battery holder that allows the battery cells to be arranged in erected positions and in a plurality of rows; and the first contact portion and the second contact portion of the battery terminal are spaced apart from each other in parallel with a coupling direction of the battery terminal and the main body terminal. the battery further includes a battery holder that allows the battery cells to be arranged in erected positions and in a plurality of rows; and the first contact portion and the second contact portion of the battery terminal are spaced apart from each other in parallel with a coupling direction of the battery terminal and the main body terminal.