Battery and electrical apparatus

An electrical apparatus, comprising a battery for supplying electric energy to the electrical apparatus, wherein the battery comprises:

• an air-cooling structure, comprising a body and at least one air duct penetrating the body in a first direction;
• and
• a plurality of battery cells,
• wherein the plurality of battery cells are cylindrical, axes of the plurality of battery cells are parallel to the first direction, and the plurality of battery cells are arranged around the air-cooling structure;
• and the air-cooling structure is configured to discharge heat generated by the plurality of battery cells with air introduced into the air duct;
• wherein the plurality of battery cells are pasted on a region of a first surface of the body away from the air duct by means of a thermally conductive structural adhesive;
• and
• wherein a region on the first surface to which the plurality of battery cells are not pasted is provided with a weight-reducing groove.