BATTERY AND LAMINATED BATTERY

A battery includes a first electrode, a second electrode, and a solid electrolyte layer located between the first electrode and the second electrode. The first electrode includes a first collector and a first active material layer located between the first collector and the solid electrolyte layer. The first collector has at least one first slit, the at least one first slit penetrating the first collector in a thickness direction and being connected to an outer edge of the first collector.