TP4056 lithium battery charging protection board with 1A current and 3A discharge protection

This integrated charging and protection module provides a complete solution for managing single lithium-ion cells, particularly 3.7V batteries like 18650 types. Combining charging functionality with safety protection circuits on a single 26 x 17 mm blue PCB, it simplifies the implementation of reliable battery management in various portable electronics and DIY projects. The board accepts standard 5V USB power for charging while monitoring battery conditions to prevent damage from over-discharge or excessive current draw during use.

Features and Construction

Built around the TP4056 controller chip, this board integrates multiple protection functions with charging capability. The compact design with exposed component layout allows for straightforward inspection and connection, while the blue PCB provides clear visual contrast for component identification. All protection thresholds are factory-set according to standard lithium battery requirements.

Material and Build

The board utilises standard printed circuit board construction with copper traces connecting surface-mounted electronic components. Component selection focuses on delivering the specified charging and protection functions within the compact 26 x 17 mm footprint. The blue solder mask provides a consistent background for component visibility, while exposed connection points facilitate easy wiring to battery terminals and external circuits.

Size and Practical Fit

With dimensions of 26 x 17 mm, the board occupies minimal space in project enclosures or battery compartments. This compact form factor makes it suitable for integration into portable devices, DIY projects, and space-constrained applications where separate charging and protection circuits would require more room. The small size does not compromise functionality, as it includes both charging management and comprehensive protection features.

Uses and Placement

Designed for single lithium-ion cells, this board serves applications requiring both battery charging and load protection. Its standard voltage specifications make it compatible with common 3.7V lithium batteries, while the protection features ensure safe operation across various usage scenarios.

Event or Professional Use

For professional or repeated-use applications, the board provides reliable charging termination at 4.2V with ±1% accuracy, helping maintain battery health over multiple charge cycles. The 3A overcurrent protection prevents damage from unexpected short circuits or excessive load demands, which is particularly valuable in field applications where equipment reliability is essential. The 2.5V discharge cut-off protects against cell damage from deep discharge during extended use.

Everyday Home Use

In home DIY projects and personal electronics, the 5V USB charging input allows convenient powering from common phone chargers, power banks, or computer ports. The 1000mA charging current provides efficient power transfer without requiring specialised charging equipment. For hobbyists building portable devices, the integrated protection eliminates the need for separate circuits, simplifying project construction while maintaining safety standards for lithium battery handling.

Benefits and Buying Value

This integrated board offers practical advantages for anyone working with single lithium batteries, combining essential functions in one component. By providing both charging management and protection circuits, it reduces the complexity of battery-powered projects while addressing key safety concerns associated with lithium cell usage.

Reuse and Low Maintenance

The protection circuits help extend battery life by preventing damage from over-discharge and excessive current, potentially reducing replacement frequency. Standard 5V charging compatibility means existing USB power sources can be utilised without additional adapters. The compact design allows the board to be incorporated into various projects without requiring significant redesign if moved between applications.

Why Choose This Product

This board provides a complete charging and protection solution in a single compact unit, eliminating the need to source and connect separate components. The specified protection thresholds (2.5V discharge cut-off, 3A overcurrent protection) address the most common failure modes for lithium batteries in practical applications. With clear voltage and current specifications, users can confidently integrate it into projects knowing exactly how it will perform under different operating conditions.