TP4056 Type-C Lithium Battery Charging Module

Charging a lithium cell without protection circuitry is a genuine safety risk - overcharge, over-discharge and short circuits can all damage the cell or worse. The TP4056 handles the actual CC/CV charging curve lithium cells require, while onboard protection circuitry independently guards against overcharge, over-discharge, over-current and short-circuit conditions, so a wiring mistake or a runaway charge cycle gets caught in hardware rather than depending on careful code.

USB Type-C input is the modern update over the older Micro USB version, charging at up to 1A with a full charge voltage of 4.2V matching standard Li-ion chemistry exactly. Status LEDs show charging state directly - a simple visual check without needing a meter to confirm a battery is actually charging.

Standard building block for any battery-powered project: DIY power banks, portable Arduino or ESP32 projects running off 18650 cells, and any build needing safe, monitored lithium battery charging.