4S 18650 Lithium Battery Protection Board [Green]

14.8V 18650 Lithium Battery Protection Module | BMS | 8A/ 15A/ 10A/ 20A/ 30A/ 40A

The 4S 18650 Lithium Battery Protection Board (Green) is a reliable Battery Management System (BMS) designed for 4-Series (4S) 18650 Lithium-ion battery packs. This BMS protects your battery pack against overcharge, over-discharge, overcurrent, and short-circuit conditions while maintaining balanced charging between cells for improved battery life and consistent performance. Available in multiple current ratings ranging from 8A to 40A, including different 20A variants, this protection board is suitable for DIY battery packs, portable power stations, solar energy storage, electric vehicles, robotics, and various industrial applications.

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Key Features

• Designed for 4S (4-Series) 18650 Lithium-ion battery packs.
• Available in multiple current ratings: 8A, 10A, 15A, 20A (Type 1/2/3/4), 30A ,40A.
• Integrated cell balancing function.
• Overcharge protection.
• Over-discharge protection.
• Overcurrent protection.
• Short-circuit protection.
• High-efficiency MOSFET design.
• Stable charging and discharging performance.
• Compact and lightweight PCB design.
• Improves battery life and performance.
• Easy to install and integrate into battery packs.
• Suitable for DIY and commercial battery pack assembly.

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Technical Specifications

Note: Continuous discharge current depends on the selected variant.

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Applications

• DIY 18650 Battery Pack Assembly..
• Lithium-ion Battery Pack Protection.
• Rechargeable Battery Packs.
  
• Power Banks.
• Solar Energy Storage Systems.
• Battery Energy Storage Systems (BESS).
• UPS Backup Battery Systems.
• Emergency Backup Power Supplies.
• Electric Bicycles (E-Bikes).
• Electric Scooters.
• Electric Skateboards.
• Electric Wheelchairs.
• Electric Ride-on Toys.
• Battery Powered Robots.
• Robotics & Automation Projects.
• Arduino Battery Projects.
• IoT Battery Systems.
• CCTV Backup Power Systems.
• LED Lighting Backup Systems.
• Medical Portable Devices.
• Industrial Battery Packs.
  
• Portable DC Power Supplies.
  
• DIY Electronics Projects.

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Precautions

• Use only with 4S (4-cell) Lithium-ion battery packs.
• Do not use with LiFePO4 batteries.
• Connect balance wires in the correct sequence.
• Verify battery polarity before installation.
• Select the appropriate current rating according to your load.
• Never exceed the rated current of the selected BMS.
• Use matched battery cells with equal capacity and voltage.
• Prevent short circuits during installation.
• Keep away from moisture and excessive heat.
• Ensure proper insulation after installation.