Lithium Battery Charging and Protection Board: 5V USB Input with 1000mA Charging and 3A Protection

This integrated board combines the essential functions required to manage a single-cell lithium-ion or lithium-polymer battery safely and effectively. Designed for hobbyists, makers, and electronic project developers, it eliminates the need for separate charging and protection circuits by integrating both into one compact unit. Simply connect a standard 5V USB power source, and the board handles the controlled charging process up to a 1000mA current while actively monitoring for hazardous conditions like over-discharge and excessive current draw from the load. Its ready-to-use design saves time on circuit design and component sourcing, offering a reliable foundation for powering portable devices, prototypes, or custom electronics.

Features and Construction

The board's primary value lies in its integration of multiple critical battery management functions onto a single, small printed circuit board. This consolidation simplifies wiring and assembly in final products. The construction is focused on providing these specified electrical characteristics within a minimal physical footprint.

Material and Build

The module is built on a standard printed circuit board (PCB) which hosts all the necessary integrated circuits, resistors, capacitors, and connectors. The PCB serves as both the structural base and the electrical pathway connecting the components to realise the charging and protection algorithm. The board is supplied in a blue colour, which is a standard PCB solder mask option and aids in visual identification.

Size and Practical Fit

With dimensions of just 26mm by 17mm, this board is designed for space-conscious applications. Its compact size allows it to be embedded into small enclosures or tucked into tight spaces within a larger assembly, such as inside a custom flashlight, a portable speaker, or a handheld gaming device. The small footprint is a key differentiator for projects where internal space is at a premium.

Uses and Placement

This module is versatile, serving as the power management core for a wide range of battery-operated projects. It bridges the gap between a raw lithium cell and the device it powers, ensuring safe operation.

Event or Professional Use

For professional prototyping or commercial product development, this board offers a tested and reliable sub-module that can accelerate the design phase. It provides a certified charging solution (meeting the precise 4.2V cut-off standard) and built-in safety protections, which can be crucial for compliance and risk reduction in pre-production models or limited-run electronic goods.

Everyday Home Use

DIY enthusiasts and makers will find this board ideal for home electronics projects. It can be used to retrofit older devices with safe lithium battery power, build custom power banks, or create battery-powered sensors and IoT devices. The 5V USB input makes it convenient to charge from common phone chargers, power banks, or computer ports.

Benefits and Buying Value

Choosing this integrated board brings several practical advantages centred on safety, convenience, and design efficiency.

Reuse and Low Maintenance

The board's protection features directly contribute to the longevity of the connected lithium battery. By preventing over-discharge below 2.5V and cutting off current during a short-circuit or overload condition (3A limit), it helps avoid one of the most common causes of premature battery failure. This protection can make a battery pack reusable and reliable over many more charge cycles.

Why Choose This Product

This product is chosen for its specific combination of parameters: the 5V input for universal compatibility, the 1000mA charging current for reasonably swift charging, and the integrated 3A overcurrent protection. It provides a known, predictable set of electrical characteristics in a ready-made package, saving significant design, testing, and sourcing time compared to building a custom solution from discrete components.