Compact 5V Lithium Battery Charging and Protection Integrated Board with 4.2V Cut-off

This lithium battery charging and protection integrated board offers a consolidated solution for managing single-cell lithium batteries in various electronic applications. It eliminates the need for separate charging modules and protection circuits, providing a space-efficient component for DIY enthusiasts, makers, and repair technicians. The board's defined specifications, including its 5V input compatibility and clear protection thresholds, make it a practical choice for projects ranging from portable power banks to custom gadgets where reliable battery operation is essential, all contained within its small 2.6 by 1.7 cm footprint.

Features and Construction

The board's design integrates core battery management functions onto a single printed circuit board. This integration simplifies wiring and assembly in end-user projects, reducing component count and potential points of failure.

Material and Build

The unit is built on a standard fibreglass printed circuit board (PCB), populated with surface-mount electronic components that form the charging and protection circuitry. The blue solder mask colour aids in visual identification during assembly. The specific integrated circuits and discrete components used to achieve the stated voltage and current parameters are not detailed in the provided source text.

Size and Practical Fit

With dimensions of 26 mm by 17 mm, the board is designed for compact integration. This small size allows it to be fitted into tight spaces within electronic enclosures, making it suitable for portable or miniaturised devices. The board likely uses standard 2.54 mm (0.1 inch) pitch headers or solder pads for connection, a common practice for such modules.

Uses and Placement

This board is suited for a range of applications where a single lithium-ion or lithium-polymer cell requires managed charging and circuit protection. Its defined parameters guide its use case.

Event or Professional Use

For professional prototyping, electronics repair, or educational workshops, this board serves as a ready-made, spec-defined component. Its 3A overcurrent protection and 2.5V over-discharge cut-off provide a known safety baseline for testing circuits or refurbishing devices with built-in batteries, offering a measurable level of risk mitigation compared to unprotected setups.

Everyday Home Use

Hobbyists and makers can utilise this board in DIY projects like custom Bluetooth speakers, handheld gaming devices, or emergency power packs. The 5V input makes it directly compatible with USB chargers and power banks, simplifying the charging setup for end users. The protection features help extend the usable life of the connected battery in these intermittent-use applications.

Benefits and Buying Value

The value of this integrated board lies in its combination of functionality, specified performance, and compact form factor.

Reuse and Low Maintenance

As a solid-state electronic module with no moving parts, the board is designed for long-term use with minimal maintenance. Its protection circuitry actively works to prevent battery damage from deep discharge or short circuits, which can support the repeated charging cycles of a connected battery. The board itself requires no upkeep beyond ensuring clean electrical connections.

Why Choose This Product

Choosing this board is a decision for practicality and defined specs over a bespoke or separated design. It offers a known set of parameters—a 1000mA charge current, 4.2V cut-off, and key protection voltages—in one pre-assembled unit. This is advantageous for users who need a reliable, off-the-shelf battery management solution without designing a circuit from scratch, saving time and reducing complexity in their projects.