BATTERY AND ELECTRIC DEVICE

The present application provides a battery and an electrical apparatus. The battery comprises a case, an electrode assembly and an electrolyte solution. The case is provided with an accommodating cavity inside, and the electrode assembly and the electrolyte solution are both arranged within the accommodating cavity. The electrode assembly comprises a positive electrode plate comprising a positive electrode current collector and a positive electrode active layer located on at least one surface of the positive electrode current collector. The positive electrode active layer comprises a positive electrode active material having a chemical formula of Li(NiCoMn)MOA; the K of the battery satisfies 1.6g/Ah≤Kr≤1.9g/Ah, K represents the ratio of the mass of free electrolyte solution to the rated capacity of the battery, in units of g/Ah; and the space utilization rate η of the battery is >0.8.