Abstract: A battery device comprises a nonaqueous electrolyte secondary battery provided with an electric power generating element and a pressing member which presses the electric power generating element in the stacking direction. The electric power generating element comprises: a positive electrode with a positive electrode active material layer of a positive electrode active material on the surface of a positive electrode collector; a negative electrode with a negative electrode active material layer of a negative electrode active material on the surface of a negative electrode collector; and a separator which holds an electrolyte solution. This battery device satisfies (1) 0.1<(T1?T2)/T1×100<5, where T1 is the thickness of the thickest portion of the electric power generating element in the stacking direction, and T2 is the thickness of the thinnest portion of the of the electric power generating element in the stacking direction.

Abstract: The object is to seek a position for an insertion opening through which a treatment tool inserted inside a body cavity may reach an affected area while avoiding an obstacle. A first light emitting portion placed in an insertion portion applies light to an affected area inside a body cavity. A second light emitting portion placed in the insertion portion applies light to an inner wall of the body cavity toward the opposite side of the first light emitting portion. At this time, a light pathway on which the light from the first light emitting portion and the second light emitting portion will not strike the obstacle (e.g., an organ outside than the affected area, etc.) inside the body cavity is searched for. By making, in the position that the light from the second light emitting portion strikes, an insertion opening for inserting a treatment tool, the treatment tool can reach the affected area without interfering with the obstacle.

Abstract: The object is to seek a position for an insertion opening through which a treatment tool inserted inside a body cavity may reach an affected area while avoiding an obstacle. A first light emitting portion placed in an insertion portion applies light to an affected area inside a body cavity. A second light emitting portion placed in the insertion portion applies light to an inner wall of the body cavity toward the opposite side of the first light emitting portion. At this time, a light pathway on which the light from the first light emitting portion and the second light emitting portion will not strike the obstacle (e.g., an organ outside than the affected area, etc.) inside the body cavity is searched for. By making, in the position that the light from the second light emitting portion strikes, an insertion opening for inserting a treatment tool, the treatment tool can reach the affected area without interfering with the obstacle.