USB 5V 1A Boost Charger Module for 18650 battery — DIY powerbank

2-in-1 module: TP4056 charger + 5 V boost for building a DIY powerbank from an 18650 cell. Micro-USB 5 V input for charging (1 A). Regulated USB-A 5 V / 1 A output via integrated boost converter. Simultaneous charge and discharge possible (pass-through). Charge status and battery level LED indicators (4 LEDs). Deep discharge, overcharge and short-circuit protection. Socket for soldering an 18650 holder or direct cables. PCB dimensions 65 × 18 mm. Ideal educational project.