Function: Linear lithium-ion/lithium-polymer battery charging module with built-in Micro USB input port.

Charging IC: Based on the TP4056 dedicated Li-Ion charge management controller.

Input Voltage: 4.5V to 5.5V DC via Micro USB connector.

Charging Current: Default 1A (set by onboard resistor; can be modified if needed).

Battery Compatibility: Single-cell 3.7V Li-Ion / Li-Po rechargeable batteries (nominal 4.2V full charge).

Protection Features:

Overcharge protection

Over-discharge protection

Over-current/short-circuit protection

Trickle charge for deeply discharged cells

Status Indicators: Dual onboard LEDs – Red (charging), Blue/Green (fully charged).

Applications: Suitable for DIY power banks, wearable devices, IoT gadgets, battery-powered electronics, and portable projects.