Oasis Select

18V BMS Board for Makita BL1830 BL1840 BL1850 BL1860 Li-Ion

$24.11 USD

~~$29.87 USD~~ $24.11 USD

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18V BMS Battery Protection Board for Makita BL1830 / BL1840 / BL1850 / BL1860

Keep your Makita 18V lithium-ion battery packs running safely and reliably with this purpose-built Battery Management System (BMS) Protection Circuit Board. Designed as a direct replacement PCB for Makita BL1830, BL1840, BL1850, and BL1860 battery packs, this board actively monitors and protects your cells from overcharge, over-discharge, overcurrent, and short-circuit events — extending the life of your valuable battery packs and keeping your tools performing at their best.

Whether you're a tradesperson, DIY enthusiast, or repair technician, this BMS board is an affordable and effective way to restore or protect a failing Makita 18V Li-Ion pack rather than replacing it entirely.

Made in Mainland China.

Key Features

Compatible Models: Makita BL1830, BL1840, BL1850, BL1860 18V Lithium-Ion battery packs
Function: Full battery management — overcharge, over-discharge, overcurrent & short-circuit protection
Colour: Blue PCB
Weight: 50g per unit (lightweight and easy to install)
Certification: CE certified for safety compliance
No high-concern chemicals — safe materials throughout
Package Contents: 1 × BMS Protection Board
Packaging: Securely bagged for safe delivery

Why Use a BMS Protection Board?

A Battery Management System (BMS) is the electronic "guardian" of your lithium-ion battery pack. Without a functioning BMS, Li-Ion cells are vulnerable to dangerous overcharging and deep discharge cycles that can permanently damage cells or, in extreme cases, create a safety hazard. Replacing a faulty BMS board is one of the most cost-effective ways to restore a dead or underperforming battery pack back to full working order.

For further information on lithium-ion battery safety, visit the U.S. Consumer Product Safety Commission (CPSC) – Lithium-Ion Battery Safety.

Specifications

Accessory Type	Battery Management System (BMS) PCB
Compatible Voltage	18V
Compatible Models	Makita BL1830, BL1840, BL1850, BL1860
Battery Chemistry	Lithium-Ion (Li-Ion)
Colour	Blue
Weight	50g
Certification	CE
Battery Included	No
Charger Included	No
Country of Origin	Mainland China

Frequently Asked Questions

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

A: This BMS protection circuit board is specifically designed for Makita 18V lithium-ion battery packs, including the BL1830, BL1840, BL1850, and BL1860 models. Always verify the model number on your existing battery pack before purchasing.

Q: What does the BMS protection board actually protect against?

A: The Battery Management System (BMS) PCB protects your Li-Ion cells from overcharging, over-discharging, overcurrent draw, and short-circuit events. These protections help prevent cell damage, extend battery pack lifespan, and maintain safe operation during charging and use.

Q: Is this a direct replacement for a faulty BMS in my Makita battery pack?

A: Yes. This board is designed as a replacement BMS PCB for the listed Makita 18V battery packs. If your battery pack no longer holds charge or fails to charge correctly, a faulty BMS board is a common cause. Replacing it with this board (performed by a qualified technician) can restore your pack to working condition.