Makita 18V Lithium-Ion Battery BMS PCB Protection Board

Keep your Makita power tool batteries safe and running at peak performance with this dedicated Battery Management System (BMS) PCB Protection Board. Designed specifically for the Makita BL1830, BL1840, BL1850, and BL1860 18V lithium-ion battery series, this drop-in replacement board provides essential electronic protection against overcharge, over-discharge, and short circuits — extending the life of your battery pack significantly.

Whether you're a DIY enthusiast or a professional tradesperson, replacing a faulty protection board is a cost-effective alternative to purchasing a brand-new battery. Made in Mainland China.

Key Features

Compatible Models: Makita BL1830, BL1840, BL1850, BL1860 (18V Lithium-Ion)
Function: Battery Management System (BMS) — overcharge, over-discharge & short-circuit protection
Color: Blue PCB
Weight: 50g (lightweight, easy to handle)
Package Contents: 1× BMS PCB Protection Board
Packaging: Secure bag packaging for safe delivery

Why Replace Your BMS Protection Board?

A failing BMS protection board is often the root cause of a battery that won't charge, drains too quickly, or cuts out under load. Instead of discarding an otherwise healthy battery pack, swapping out the protection board is a smart, budget-friendly repair. This board is a precise fit for the Makita 18V platform, making the repair straightforward for anyone comfortable with basic electronics.

Compatibility

Makita BL1830 18V 3.0Ah
Makita BL1840 18V 4.0Ah
Makita BL1850 18V 5.0Ah
Makita BL1860 18V 6.0Ah

Safety & Electrical Reference

For best practices when working with lithium-ion battery components, refer to CPSC Lithium-Ion Battery Safety Information from the U.S. Consumer Product Safety Commission.

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Frequently Asked Questions

Q: Which Makita battery models is this BMS PCB protection board compatible with?

A: This protection board is designed specifically for the Makita BL1830, BL1840, BL1850, and BL1860 18V lithium-ion battery packs. Always verify your battery model number before ordering to ensure compatibility.

Q: What does a BMS PCB protection board do for a lithium-ion battery?

A: A Battery Management System (BMS) PCB protection board monitors and controls the charge and discharge cycles of lithium-ion cells. It protects against overcharging, over-discharging, overcurrent, and short circuits — all of which can damage cells or create safety hazards. Replacing a faulty BMS board can restore full function to an otherwise healthy battery pack.

Q: Is this a direct drop-in replacement for Makita 18V batteries?

A: Yes. This board is engineered to fit the Makita BL1830/BL1840/BL1850/BL1860 battery housings. Basic electronics repair skills and proper tools are recommended for installation. If you are unsure about the repair process, consult a qualified technician.

Q: What is included in the package?

A: Each order includes 1× BMS PCB Protection Board (blue). The battery cells and battery housing are not included — this is a replacement circuit board only.

Made with care

Great value

Elegant design

Quality materials

This product is crafted with quality materials to ensure durability and performance. Designed with your convenience in mind, it seamlessly fits into your everyday life.

We strive to process and ship all orders in a timely manner, working diligently to ensure that your items are on their way to you as soon as possible.

We are committed to ensuring a positive shopping experience for all our customers. If for any reason you wish to return an item, we invite you to reach out to our team for assistance, and we will evaluate every return request with care and consideration.