Battery

A battery comprising:

• a solid-state battery section having a structure in which a plurality of power generating elements are laminated, each of which has a first electrode layer, a second electrode layer, and a first solid electrolyte layer positioned between the first electrode layer and the second electrode layer;
• and
• a structure including a second solid electrolyte layer in contact with the power generating element so as not to be in contact with more than or equal to two power generating elements of the plurality of power generating elements on a side surface of the solid-state battery section, at least one reference electrode section facing the side surface of the solid-state battery section across the second solid electrolyte layer and including a reference electrode in contact with the second solid electrolyte layer, and an insulating member which is disposed so as to surround the second solid electrolyte layer in plan view of the side surface of the solid-state battery section and covers the side surface of the solid-state battery section.