The integrated circuit (IC) used in Li-ion chargers is specifically designed to manage and control the charging process of lithium-ion batteries. Its primary function is to regulate the flow of electrical current into the battery, ensuring a safe and efficient charging experience. This specialized IC takes into account the unique characteristics of Li-ion batteries, such as their voltage and temperature requirements, to prevent overcharging or overheating. By doing so, it helps extend the lifespan of the battery while maintaining its performance.