Lithium Battery Charging and Protection Integrated Board 5V 1000mA 4.2V Cut-Off 2.5V Over-Discharge 3A Overcurrent Protection 2.6x1.7cm Blue PCB
Lithium Battery Charging and Protection Integrated Board 5V 1000mA 4.2V Cut-Off 2.5V Over-Discharge 3A Overcurrent Protection 2.6x1.7cm Blue PCB
Lithium Battery Charging and Protection Integrated Board 5V 1000mA 4.2V Cut-Off
This single-board module combines lithium battery charging and protection circuits into one compact unit, saving space and simplifying wiring in DIY electronics projects, battery packs, and repair work. Accepting a standard 5V input, it delivers up to 1000mA charging current with a precise 4.2V cut-off voltage. Protection features include over-discharge cutoff at 2.5V and overcurrent protection at 3A, helping to maintain battery health and prevent damage from common fault conditions. At just 2.6 x 1.7 cm, the blue PCB fits comfortably in small enclosures or custom builds.
Features and Construction
The board integrates two essential functions for single-cell lithium battery management: a constant-current/constant-voltage charger and a protection circuit. All components are mounted on a compact blue PCB.
Charging Circuit
The charging section regulates input from a 5V supply to safely charge a single-cell lithium battery at up to 1000mA. Charge termination occurs at 4.2V ±1%, preventing overcharge and extending battery cycle life.
Protection Circuit
The protection section monitors battery voltage and current. It disconnects the load when voltage drops to 2.5V (over-discharge protection) and limits current to 3A (overcurrent protection). These thresholds are fixed and not user-adjustable.
Size and Practical Fit
With dimensions of 2.6 x 1.7 cm, the board is small enough for portable projects, battery holders, or replacement in existing devices. Its compact layout reduces the need for separate charge and protection boards.
Uses and Placement
This board is suitable for any application requiring safe charging and basic protection of a single-cell lithium battery, such as 3.7V Li-ion or LiPo cells. It is typically wired between a USB power source and the battery.
DIY and Hobby Projects
Ideal for hobbyists building custom battery packs, portable chargers, or microcontroller-powered devices that run on a single lithium cell. The integrated design simplifies assembly and troubleshooting.
Replacement and Repair
Commonly used as a replacement board in devices where the original charging or protection circuit has failed. Its standard 5V input makes it compatible with many USB-powered gadgets.
Battery Pack Integration
Can be integrated into custom battery pack enclosures, providing both charging and protection in a single footprint. This reduces wiring and potential failure points compared to using separate modules.
Benefits and Buying Value
Choosing this integrated board offers practical benefits for electronics work, particularly in space-constrained or cost-conscious builds.
Space and Cost Efficiency
Combining two functions on one board reduces component count, saves physical space, and can lower overall project cost compared to buying separate charge and protection modules.
Simplified Wiring
With only input and battery terminals, the board minimises wiring errors. This is especially useful for beginners or for projects where reliability is important.
Consistent Performance
Factory-set thresholds for charge cut-off, over-discharge, and overcurrent provide repeatable performance without user calibration, ensuring consistent battery management across multiple units.