Cover

A cover for covering a covered body, the covered body including

• a synthetic resin L-shaped unit body attachable to a corner portion formed by a first surface and a second surface of a battery,
• a first fixing portion of the unit body abutting on the first surface, and
• a second fixing portion of the unit body abutting on the second surface of the battery;
• the cover, comprising:
• a top wall configured to cover the covered body, the top wall including a first top wall portion covering an upper surface of the first fixing portion, and a second top wall portion covering the second fixing portion;
• a first side wall connected to one end of the second top wall portion;
• a second side wall facing the first side wall connected to other end of the second top wall portion and facing the first side wall;
• and
• a lock releasing portion, wherein
• the first side wall comprises a locking portion engageable with a locked portion of a covered body,
• the second side wall comprises an opposed locking portion engageable with an opposed locked portion of the covered body, and
• the lock releasing portion comprises:
• a release operation portion inclined and projecting outward from a connected portion of the second top wall portion and the first side wall in a cover mounting direction;
• and a connecting portion connecting the release operation portion with the first side wall around the locking portion, or the release operation portion with the locking portion.