5V Lithium Battery Charging and Protection Board with 4.2V Cut-off and 1000mA Charging

This all-in-one lithium battery management board combines a charging circuit with critical protection features on a single, compact 26mm by 17mm module. Designed for DIY electronics, portable gadgets, and small power banks, it provides a straightforward solution for safely managing a single-cell lithium-ion or lithium-polymer battery. It accepts a standard 5V input, making it compatible with common USB power sources. By integrating overcharge prevention, over-discharge cut-off, and overcurrent protection, it helps extend battery life and enhances the safety of your projects. The board arrives ready for soldering connections to your power source, battery, and load.

Features and Construction

The board's primary function is to manage a single lithium battery cell's charging cycle and provide safeguards against common electrical faults. Its design prioritises essential functionality within a minimal footprint, making it a practical choice for space-constrained applications.

Material and Build

The module is constructed on a standard fibreglass printed circuit board (PCB) with a blue solder mask. All necessary electronic components for charging and protection are soldered onto this board. This integrated design eliminates the need for separate charging ICs and protection circuits, simplifying assembly and reducing the component count in your final product. The blue colour is a standard finish for PCBs and aids in visual inspection of solder joints.

Size and Practical Fit

The board measures 26mm by 17mm, a compact size that offers significant flexibility for integration. This small footprint allows it to be fitted into tight enclosures for portable devices, drones, or custom battery packs. The dimensions are provided to help with planning the layout within your project case. Mounting holes are not specified, so you may need to secure it using adhesive or a custom bracket depending on your application.

Uses and Placement

This board serves as the core power management unit in a variety of electronic applications where a rechargeable lithium battery is the power source.

Event or Professional Use

In professional prototyping, product development, or educational electronics kits, this module provides a reliable, pre-built solution for battery management. It saves design and testing time for engineers and hobbyists focusing on the core functionality of their device rather than the power subsystem. It is suitable for integration into portable measurement equipment, demonstration units, or custom tools that require a safe, rechargeable power source.

Everyday Home Use

For DIY enthusiasts and makers, this board is ideal for powering custom projects like LED lighting setups, small fans, or sensor nodes. It can be used to build or repair portable phone chargers, wireless speakers, or remote-controlled toys. The clear specifications allow for straightforward wiring to common lithium cells, enabling the creation of custom battery-powered devices for home automation, gardening, or security.

Benefits and Buying Value

Choosing this integrated board offers practical advantages centered on simplification, safety, and space efficiency for your electronic designs.

Reuse and Low Maintenance

The board is a durable, solid-state module with no moving parts, designed for long-term use within a finished product. Once correctly installed and wired, it requires no ongoing maintenance. Its protection features help preserve the lifespan of the connected lithium battery by preventing harmful operating conditions, promoting reuse of the core power cell over multiple charge cycles.

Why Choose This Product

This product delivers specific value through its integration of multiple functions. It combines a charger with protection circuitry, eliminating the need to source and connect separate components. The clearly defined specifications—such as the 5V input, 1000mA charge current, and precise protection thresholds—provide confidence in its performance and compatibility. The compact size is a key differentiator for projects where internal space is at a premium.