Secondary battery and electric apparatus

A secondary battery, comprising a positive electrode sheet, a negative electrode sheet, and an electrolyte;

• wherein the positive electrode sheet comprises a positive electrode current collector and a positive electrode active material layer;
• the negative electrode sheet comprises a negative electrode current collector and a negative electrode active material layer;
• the positive electrode current collector integrally extends to form multiple positive electrode tabs;
• the negative electrode current collector integrally extends to form multiple negative electrode tabs;
• the positive electrode active material layer comprises a positive electrode active material, and Dv99 of the positive electrode active material is 27 μm to 33 μm;
• and the negative electrode active material layer comprises a negative electrode active material, and Dv99 of the negative electrode active material is 23 μm to 28 μm;
• the electrolyte comprises an organic solvent, a lithium salt, and an additive;
• wherein the organic solvent comprises a chain carboxylate compound;
• and based on a mass of the electrolyte, a mass percentage of the chain carboxylate compound is 6% to 56%.