Balancing LiPo Cells

This circuit uses an IC that is actually designed for monitoring the supply voltage of a microcontroller circuit. The IC (IC1) normally ensures that the microcontroller receives an active-high reset signal whenever the supply voltage drops below 4.1 V. By contrast, the output goes low when the voltage is 4.1 V or higher.
In this circuit the output is used to discharge a LiPo cell as soon as the voltage rises above 4.1 V.