18V Li-Ion Battery PCB Protection Board BL1830 BL1850 BL1860
18V Li-Ion Battery PCB Protection Board BL1830 BL1850 BL1860
18V Li-Ion Battery PCB Charging Protection Circuit Board
Keep your 18V lithium-ion power tool batteries running safely and efficiently with this purpose-built PCB charging protection board. Designed as a direct replacement for Makita BL1830, BL1840, BL1850, and BL1860 battery packs, this compact circuit board guards your cells against overcharging, over-discharging, and overheating — extending battery life and maintaining optimal performance.
Made from durable CCL (copper clad laminate), this board is built to last as long as the battery cells themselves. Whether you're rebuilding a worn pack or replacing a faulty protection circuit, this is the reliable, drop-in solution you need.
Key Features
- Compatible Models: Makita 18V BL1830, BL1840, BL1850, BL1860 power tool batteries
- Battery Type: Li-ion (5S configuration)
- Nominal Voltage: 18V
- Nominal Capacity: 3.0Ah
- Maximum Charging Current: ≤12A
- Overcharge Voltage Protection: 4.25V per cell
- Overcharge Detection Delay: 2 seconds
- Over-Discharge Voltage Protection: 14V
- Over-Temperature Protection: 100°C (recovery at 85°C)
- Board Material: CCL (Copper Clad Laminate)
- Dimensions: 45 × 32 mm
- Color: Green
What's in the Box?
- 1 × Lithium Battery PCB Protection Board
Why Choose This PCB Board?
This protection circuit board automatically monitors your battery cells during every charge and discharge cycle. It prevents costly damage from overcharging or over-discharging and shuts down the circuit if temperatures exceed safe operating limits — giving you peace of mind and longer battery life from every rebuild.
Made in Mainland China.
Note: Battery cells, charger, and power tools are NOT included. Slight colour variation from product images may occur due to monitor display settings. Allow minor measurement tolerances of ±1–2mm.
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Frequently Asked Questions
Q: Which Makita battery models is this PCB protection board compatible with?
A: This Li-ion PCB charging protection circuit board is designed for Makita 18V battery packs including the BL1830, BL1840, BL1850, and BL1860. It is suitable for rebuilding or repairing any of these battery models with 5-string cell configurations.
Q: Does this board protect against overcharging and overheating?
A: Yes. The board features built-in overcharge voltage protection (4.25V per cell), over-discharge voltage protection (14V), and over-temperature protection that activates at 100°C and resets at 85°C, keeping your battery cells safe during every charge and discharge cycle.
Q: Are battery cells or a charger included with this PCB board?
A: No — this listing is for the PCB protection board only. Battery cells, chargers, and power tools are sold separately. This board is a replacement/repair component for existing 18V Li-ion battery packs.
Q: What material is the PCB board made from?
A: The board is constructed from CCL (copper clad laminate), a durable and widely used substrate material for printed circuit boards, designed to provide reliable performance throughout the lifespan of your battery cells.