The invention provides a lithium-ion secondary battery, comprising a lithium-ion cell, a first resistor, a second resistor, a third resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, Steel shell, MicroUSB interface, protection IC, integrated IC, inductor, LED lamp, plastic parts, rigid FR‑4 substrate and metal cap, realize MicroUSB interface rechargeable, constant voltage output, charging management and protection, overcharge, overdischarge and overcurrent Protection of all-in-one functions. Compared with the prior art, the lithium ion secondary battery of the present invention has simple structure, easy installation, high integration efficiency, high reliability, multiple functions, high capacity and low cost.