Lipo Charger-MicroUSB

Charger - MicroUSB is a compact charging module designed for single‑cell 3.7V lithium batteries, delivering reliable and controlled charging in space‑constrained electronics projects. The board integrates the TP4056X lithium battery charging IC, enabling efficient power management and stable charging performance from a standard 5V Micro USB power source. Three selectable current modes allow flexible adaptation to different battery capacities, while integrated thermal feedback dynamically regulates current under high load or elevated temperature conditions. This miniature lithium battery charging board supports safe, efficient energy management for portable electronics, embedded systems, and compact IoT devices requiring dependable Li‑Po battery charging.

Note: Low current mode can be used to charge large‑capacity batteries, but high current mode cannot be used to charge small‑capacity batteries. Excessive charging current may cause battery damage or explosion.

Selectable Charging Current for Different Battery Capacities

This lithium battery charging module provides three configurable charging current modes—50mA, 200mA, and 500mA—allowing adaptation to various battery capacities. Current selection is achieved by configuring bonding pads on the back of the board, enabling quick customization without additional circuitry. The default configuration is 50mA, suitable for smaller lithium cells. Such flexibility allows a single charging board to support a wide range of portable power applications, from compact wearable electronics to larger rechargeable battery packs used in embedded devices.

TP4056X Charging Control with Thermal Regulation

The onboard TP4056X charging IC provides a stable and intelligent charging process with built‑in thermal feedback. During high power operation or elevated ambient temperatures, the controller automatically reduces charging current to limit chip temperature and maintain safe operation. Three-stage charging—including trickle charge, constant current charge, and constant voltage charge—ensures efficient energy transfer while protecting lithium cells from over‑stress, extending battery lifespan and improving operational safety in embedded power systems.

Integrated Status Indicator with External Indicator Support

A built‑in LED indicator provides clear charging status feedback. The LED flashes when no battery is connected, remains on during charging, and turns off once the battery reaches full capacity. Because the LED shuts down after completion, no additional power is drawn from the battery. For enclosed systems or integrated hardware designs, the charging board also supports connection of an external indicator, allowing convenient monitoring of charging status even when the module is embedded within a device enclosure.

Ultra‑Compact Design for Embedded Integration

The miniature form factor allows easy integration into portable electronics and tightly packed hardware assemblies. With a small footprint and straightforward Micro USB power input, this compact Li‑Po charging circuit board fits seamlessly into custom PCBs, wearable devices, robotics platforms, and low‑power electronics. The small size combined with efficient charging control makes the board suitable for designers requiring a dependable charging subsystem without adding bulk to compact electronic products.

This Micro USB lithium battery charging board suits portable electronics, wearable devices, small robotics systems, wireless sensors, and embedded IoT hardware. Reliable charging control, adjustable current output, and compact physical dimensions enable straightforward integration into custom battery‑powered projects requiring stable and safe single‑cell Li‑Po charging.