The TP4056 charging module is designed for single-cell 3.7V Li-ion/Li-polymer batteries. It features a constant current/constant voltage (CC/CV) charging method with built-in current protection to prevent overcurrent damage. Equipped with a Micro USB input for easy connection to USB power sources. The module includes charging status indicator LEDs (red for charging, blue/green for full charge) for user-friendly operation. Ideal for DIY projects and small battery-powered devices requiring safe and efficient charging.