5V Lithium Battery Charging and Protection Board with 1000mA Current and 3A Overcurrent Protection

This integrated charging and protection board provides a complete solution for single-cell lithium battery management in DIY electronics, portable devices, and small-scale projects. Designed with practical dimensions measuring 2.6cm by 1.7cm, the blue PCB houses all necessary components for safe battery charging and protection without requiring additional modules. The board accepts standard 5V input from common power sources like USB ports or wall adapters, delivering controlled charging up to 1000mA maximum current. With automatic charging termination at 4.2V ±1% and comprehensive protection against over-discharge and overcurrent conditions, this integrated design simplifies lithium battery implementation while maintaining essential safety features.

Features and Construction

The board integrates both charging circuitry and protection functions on a single compact PCB, eliminating the need for separate modules and reducing connection complexity. This all-in-one approach provides straightforward implementation while maintaining the essential specifications required for safe lithium battery operation.

Material and Build

Constructed on a blue printed circuit board substrate, the module features surface-mount electronic components arranged for efficient layout within the 2.6cm x 1.7cm footprint. The blue PCB colour provides good contrast for component identification and inspection, while copper traces connect the integrated circuit, protection components, and input/output terminals. The board includes a charging IC that manages the constant-current/constant-voltage charging process, a protection IC that monitors battery voltage and current, and supporting passive components that complete the circuit functionality.

Size and Practical Fit

With dimensions of 2.6cm by 1.7cm, the board offers a compact form factor suitable for integration into space-constrained projects and portable devices. This size allows placement in various enclosure designs while providing sufficient area for clear component spacing and terminal connections. The board thickness follows standard PCB dimensions, and its rectangular shape with straight edges facilitates secure mounting using standard standoffs or adhesive methods in final assemblies.

Uses and Placement

The integrated charging and protection functionality makes this board suitable for various applications where lithium battery power needs reliable management. From DIY electronics projects to small commercial products, the board provides essential battery management without complex circuit design.

Event or Professional Use

For professional prototyping or small-batch production, this board offers tested charging and protection specifications including the 4.2V ±1% charging cut-off and 3A overcurrent protection. The predefined parameters eliminate calibration requirements and provide consistent performance across multiple units. Event equipment requiring portable power, temporary installations, or demonstration units can benefit from the integrated protection that prevents battery damage during extended use or storage periods.

Everyday Home Use

DIY enthusiasts and makers can incorporate this board into custom power banks, portable lighting, small robots, or sensor projects requiring lithium battery power. The 5V input compatibility allows charging from common USB power sources, while the protection circuitry provides safety during both charging and discharging cycles. Home automation projects, portable speakers, or custom electronic gifts can utilize this board to manage 18650, 14500, or similar lithium cells with appropriate current ratings.

Benefits and Buying Value

The integrated design offers practical advantages through simplified implementation and reliable operation based on specified electrical parameters. By combining charging and protection functions, the board reduces component count and connection complexity while maintaining essential safety features.

Reuse and Low Maintenance

The board supports repeated charging cycles through its controlled charging algorithm with precise voltage termination at 4.2V ±1%, which helps maintain battery health over multiple cycles. The protection functions operate automatically without user intervention, disconnecting the battery at 2.5V during over-discharge and limiting current during overload conditions up to 3A. This automatic operation reduces maintenance requirements and protects against common usage errors that could otherwise damage batteries or connected devices.

Why Choose This Product

This board provides complete lithium battery management with verified specifications including 1000mA maximum charging current, 3A overcurrent protection, and compact 2.6cm x 1.7cm dimensions. The integrated design simplifies implementation compared to separate charging and protection modules, while the blue PCB offers good component visibility for inspection. With 5V input compatibility matching common power sources and comprehensive protection features, this board delivers practical functionality for various lithium battery applications without requiring complex circuit design expertise.