M18 18V Li-ion Battery DIY PCB Charging Protection Circuit Board

18V M18 Li-ion Battery DIY PCB Charging Protection Circuit Board (3Ah–6Ah)

Upgrade or restore your 18V M18-compatible power tool batteries with this DIY PCB Charging Protection Circuit Board. Designed for 18650 lithium-ion battery packs ranging from 3Ah to 6Ah, this green PCB board features a built-in IC that actively monitors voltage and current, keeping your battery pack operating safely and efficiently. Made in Mainland China.

Key Features

• Smart Built-in IC: Detects battery cell voltage and current in real time, and logs usage cycles for accurate battery management.
• Multi-Layer Protection: Includes overheat, overvoltage, undervoltage, overcurrent, and overcharge protection — giving you complete peace of mind during charging and use.
• Low-Voltage Shutdown: Compatible with the entire M18 series; automatically shuts down at low voltage to extend battery lifespan.
• Shock-Resistant & Stable: Robust PCB construction makes it an ideal partner for torque wrenches, impact drills, angle grinders, and other M18 power tools.
• Wide Compatibility: Supports 5-cell, 10-cell, and 15-cell 18650 battery configurations (3Ah to 6Ah).
• DIY-Friendly: Perfect for battery pack assembly or repair projects.

Specifications

Assembly Tips

Using New Batteries:

• Select 18650 power lithium battery cells only.
• Equip your 5/10/15-cell sets with the appropriate resistors and capacitors to ensure consistent voltage across all cells before connecting to the PCB.

Repairing an Old Battery Pack:

• Test the voltage across each individual battery cell.
• Charge all cells to the same voltage level before connecting to this protection board.

Note: PCB design may change due to supply chain or processing technology updates. Battery cells are NOT included. Actual color may vary slightly from images due to monitor and lighting differences. Please allow minor measurement deviations.

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Frequently Asked Questions

Q: Is this PCB protection board compatible with all M18 18V battery packs?

A: Yes, this DIY PCB charging protection circuit board is designed for M18 18V battery systems and supports 5-cell, 10-cell, and 15-cell 18650 Li-ion configurations, covering 3Ah to 6Ah capacities. It works with the entire M18 series, including tools like impact drills, torque wrenches, and angle grinders.

Q: Do I need to do anything special before assembling the battery pack with this board?

A: Yes. For new 18650 battery cells, make sure all cells are balanced to the same voltage using resistors and capacitors before assembly. For older cells being repaired, individually charge each cell to a matching voltage level before connecting them to the protection circuit board.

Q: Are batteries included with this PCB protection circuit board?

A: No, batteries are not included. This listing is for the PCB charging protection circuit board only. You will need to source compatible 18650 Li-ion power battery cells separately for your DIY battery pack project.

Q: What protections does this circuit board provide?

A: This board provides five key protections: overheat protection, overvoltage protection, undervoltage protection, overcurrent protection, and overcharge protection. It also features automatic low-voltage shutdown to help extend the life of your battery cells.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.