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 power tool batteries running safely and efficiently with this durable Li-Ion Battery PCB Charging Protection Circuit Board. Designed as a direct replacement for Makita BL1830, BL1840, BL1850, and BL1860 battery packs, this compact green PCB board guards your battery cells against overcharge, over-discharge, and overheating — extending the working life of your battery pack.
Made in Mainland China.
Key Features
- Universal Compatibility: Fits 18V BL1830, BL1840, BL1850, and BL1860 Li-Ion power tool battery packs (1.5Ah, 3Ah, 6Ah, 9Ah)
- Overcharge Protection: Cuts off at 4.25V per cell with a 2-second detection delay to prevent cell damage
- Over-Discharge Protection: Activates at 14V to protect cells from deep discharge
- Over-Temperature Protection: Shuts down at 100°C, recovers at 85°C for safe thermal management
- Maximum Charging Current: Supports up to 12A for fast, reliable charging cycles
- Durable Construction: Made from CCL (Copper Clad Laminate) for long-lasting, repeated use
- 5-String Cell Configuration: Perfectly matched to standard 18V Li-Ion pack architecture
- Compact Size: 45 × 32mm — fits neatly inside existing battery housings
Technical Specifications
- Type: Li-Ion Battery Charging Protection Board (PCB)
- Compatible With: 18V BL1830, BL1840, BL1850, BL1860
- Material: CCL (Copper Clad Laminate)
- Voltage: 18V
- Nominal Capacity: 3.0Ah
- Battery Type: Li-Ion
- Battery Combination: 5 strings
- Max Charging Current: ≤12A
- Overcharge Voltage Protection: 4.25V
- Overcharge Detection Delay: 2 seconds
- Over-Discharge Voltage Protection: 14V
- Over-Temperature Protection: 100°C
- Over-Temperature Recovery: 85°C
- Static Power Consumption: 20.2µA
- Dimensions: 45 × 32mm
- Color: Green
What's in the Box
- 1 × Lithium Battery PCB Protection Circuit Board
Note: Screen brightness and lighting conditions may cause slight color variation from product images. Minor measurement deviations may occur due to manual measurement.
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Frequently Asked Questions
Q: Which battery models is this 18V PCB protection board compatible with?
A: This Li-Ion battery PCB charging protection circuit board is compatible with 18V Makita-style BL1830, BL1840, BL1850, and BL1860 battery packs across capacities of 1.5Ah, 3Ah, 6Ah, and 9Ah. Always verify your battery's cell string configuration (5-string, 18V) before installation.
Q: Does the PCB board protect against both overcharging and over-discharging?
A: Yes. The board provides overcharge protection at 4.25V per cell with a 2-second detection delay, and over-discharge protection that activates at 14V total pack voltage. It also includes over-temperature protection, shutting off at 100°C and automatically recovering at 85°C.
Q: Is this a complete battery pack or just the circuit board?
A: This listing is for the PCB protection circuit board only — no battery cells, charger, or housing are included. It is a replacement/repair component intended for use by those rebuilding or servicing existing 18V Li-Ion battery packs.
Q: What material is this PCB board made from?
A: The board is constructed from CCL (Copper Clad Laminate), a robust substrate widely used in professional-grade circuit board manufacturing. This ensures reliable conductivity and durability through many charge and discharge cycles.