BATTERY

The present disclosure provides a battery. The battery includes a positive electrode plate, a negative electrode plate, a separator, and an electrolyte. The negative electrode plate has a porosity of φ in unit of %. The separator has a thickness of t in unit of μm, and a pore size of R in unit of μm. A ratio of a total mass of the electrolyte to a discharge capacity of the battery is N in unit of g/Ah. The electrolyte includes an electrolyte additive. The electrolyte additive includes a sulfate ester compound and a first lithium salt additive. The first lithium salt additive includes an oxalate-containing lithium salt. The sulfate ester compound has a structure represented by Formula I. A mass fraction of the sulfate ester compound in the electrolyte is C in unit of %. The battery satisfies Formula A: