Restore & Protect Your Makita 18V Battery with a New BMS PCB Board

Is your Makita 18V lithium-ion battery no longer holding a charge or failing to power your tools? This replacement BMS PCB Charging Protection Board is designed to bring your battery pack back to life. Compatible with popular Makita models including the BL1830, BL1840, BL1850, and BL1860, this board provides essential overcharge, over-discharge, and short-circuit protection to keep your battery running safely and efficiently.

Made in Mainland China.

Key Features

Wide Compatibility: Designed specifically for Makita BL1830, BL1840, BL1850, and BL1860 18V lithium-ion battery packs
Full Battery Protection: Integrated BMS (Battery Management System) guards against overcharge, over-discharge, overcurrent, and short circuits
Lightweight Design: Weighs just 50g — easy to handle and install inside your battery housing
Low Voltage Range: Operates within a safe low-voltage range (below 75V DC / below 50V AC)
Blue PCB Board: Easy to identify and install with clearly marked connections
Cost-Effective Repair: A fraction of the cost of a full battery replacement — save money and reduce e-waste
No High-Concern Chemicals: Safe for handling and disposal

Specifications

Compatible Models	Makita BL1830, BL1840, BL1850, BL1860
Battery Voltage	18V Lithium-Ion
Color	Blue
Weight	50g per unit
Package Contents	1x Protection Board
Voltage Range	Below 75V DC / Below 50V AC
Origin	Mainland China

Why Replace Your BMS Board?

Over time, the Battery Management System (BMS) board inside your Makita battery can degrade or fail — causing your battery to stop charging, drain too quickly, or refuse to communicate with your tools and charger. Replacing the BMS PCB is a simple, affordable fix that can restore full battery function without the need to buy a brand-new battery pack. For more information on lithium-ion battery safety and best practices, visit the U.S. Consumer Product Safety Commission (CPSC) Lithium Battery Safety Information.

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Frequently Asked Questions

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

A: This replacement BMS PCB board is specifically designed for Makita 18V lithium-ion battery models BL1830, BL1840, BL1850, and BL1860. Always verify your battery model number before purchasing to ensure compatibility.

Q: What does a BMS PCB protection board do for my Makita battery?

A: The BMS (Battery Management System) PCB board monitors and protects your lithium-ion battery from overcharging, over-discharging, overcurrent, and short circuits. When this board fails, your battery may stop charging or holding power — replacing it can restore normal battery function at a fraction of the cost of a new battery.

Q: Is this board easy to install yourself?

A: With basic electronics knowledge and the right tools (such as a soldering iron), this board can be installed as a DIY repair. However, if you are not comfortable working with lithium-ion batteries or circuit boards, we recommend seeking assistance from a qualified technician.

Q: Does this product include a battery or charger?

A: No — this listing is for the BMS PCB protection board only (1x board per pack). The battery cells and charger are not included.

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.