BATTERY

A connector can be protected and a battery capacity can be sufficiently ensured. A battery (60) is installed below a seat (34) of an electric straddle-type vehicle (1). The battery (60) is provided with a battery case (61) installed inside a body of the straddle-type vehicle (1); and a harness connector (68, 69) to which a harness (71, 72) extending from an electric device is connected. A protruding portion (64) protrudes from one surface of the battery case (61), and the harness connector (68, 69) is provided on a side surface of the protruding portion (64). The harness connector (68, 69) overlaps the battery case (61) viewed from a normal direction of the one surface, and the harness connector (68, 69) overlaps the protruding portion (64) viewed from a direction perpendicular to the normal direction.