Makita 18V 18650 BMS Battery Protection Board – 3-Alloy 21V

Makita 18V 18650 Battery Protection Board – 6MOS 3-Alloy 21V BMS with Temperature Control

Keep your Makita power tools running safely and efficiently with this 6MOS 3-Alloy 21V Battery Management System (BMS) Protection Board. Engineered for 18650 lithium-ion cell packs, this compact board features built-in temperature control and side-light compatibility, making it an ideal replacement or upgrade component for your Makita 18V battery packs.

Whether you're rebuilding a worn-out battery pack or protecting a fresh one, this BMS board guards your cells against overcharge, over-discharge, and short circuit — helping extend the working life of your battery and your tools.

Key Features

• 3-Alloy Construction: Premium-grade alloy design for improved conductivity and durability
• 21V Protection Circuit: Safeguards 18650 lithium cells in Makita 18V battery configurations
• Built-in Temperature Control: Monitors and regulates heat during charge/discharge cycles to protect battery integrity
• Side Light Compatibility: Designed specifically to support Makita-style battery packs with integrated side indicator lights
• Wide Tool Compatibility: Suitable for use with electric scissors, electric hammers, electric saws, and other Makita 18V cordless tools
• Lightweight Design: Only 30g per set — minimal added weight to your battery rebuild
• Easy Integration: Drop-in replacement board packaged securely in a protective bag

Specifications

• Accessory Type: Battery Protection Board (BMS)
• Compatible Voltage: 18V (Makita) / 21V protection circuit
• Cell Compatibility: 18650 Lithium-Ion
• Weight per Set: 30g
• Contents: 1 × Protection Board
• Packaging: Bag
• Battery Included: No
• Charger Included: No
• Made in: China

Compatible Tools Include

• Electric Scissors
• Electric Hammers
• Electric Saws
• Other Makita 18V cordless power tools using 18650 cell packs

For more information on safe lithium battery handling and power tool safety, visit CPSC.gov – Lithium-Ion Battery Safety.

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Frequently Asked Questions

Q: Is this Makita 18V BMS protection board compatible with all 18650 lithium-ion cell configurations?

A: This 3-alloy 21V protection board is designed specifically for Makita-style 18V battery packs using 18650 lithium-ion cells. It is compatible with battery packs used in electric scissors, electric hammers, and electric saws. Always verify your cell configuration before installation.

Q: Does the protection board include a battery or charger?

A: No — this listing includes only the BMS protection board (1 piece per set). Batteries and chargers are not included. It is intended as a replacement or upgrade component for existing 18650 cell battery rebuilds.

Q: What does the temperature control feature do?

A: The built-in temperature control circuit monitors heat levels during both charging and discharging. If temperatures exceed safe operating limits, the board activates protective measures to help prevent cell damage and maintain the longevity of your battery pack.

Q: What does the 21V rating mean for an 18V Makita battery?

A: Lithium-ion cells have a nominal voltage (18V) and a fully charged peak voltage (21V). The 21V protection rating means the board is calibrated to handle the full charge voltage of a Makita 18V lithium-ion pack, ensuring proper overcharge protection at peak capacity.