21V PCB Protection Board for BL1830 BL1840 BL1850 BL1860B LXT
21V PCB Protection Board for BL1830 BL1840 BL1850 BL1860B LXT
21V Battery Charging PCB Protection Circuit Board – Compatible with BL1830 / BL1840 / BL1850 / BL1860B LXT 400
Keep your 21V power tool battery packs running at their best with this replacement PCB protection circuit board. Designed to fit BL1830, BL1840, BL1850, and BL1860B LXT 400 series battery housings, this board is an essential component for DIY battery pack repairs, rebuilds, and capacity upgrades.
Key Features
- Wide Compatibility: Fits 21V battery models BL1830, BL1840, BL1850, BL1860B, and LXT 400 series battery packs.
- 10-Cell Configuration: Supports the assembly of 10 x INR18650 battery cells, making it ideal for battery pack rebuilds and capacity customization.
- Built-In Charge Protection: The integrated protection circuitry helps safeguard your battery cells during the charging cycle, promoting longer battery life.
- Repair & Assembly Ready: Perfect for DIY enthusiasts and technicians looking to repair or reassemble existing battery packs rather than replace them entirely.
- Durable Construction: Made with quality materials to withstand the demands of regular power tool use.
- No Screws Included: Note that screws are not included in the package — please source these separately if required.
Specifications
- Product Name: Mt21V Protection Board
- Voltage: 21V
- Compatible Models: BL1830, BL1840, BL1850, BL1860B, LXT 400
- Cell Support: 10 x INR18650
- Material: Stainless Steel contacts / PCB
- Country of Origin: Made in China
Package Contents
- 1 x Mt21V PCB Protection Circuit Board
Important Notes
- Product images are for reference only and may not reflect the exact size — please refer to the specifications for accurate dimensions.
- Minor measurement differences may occur due to manual measuring processes.
- Colors may vary slightly depending on your monitor's display settings.
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Learn more: EPA guidance on lithium-ion battery handling
Frequently Asked Questions
Q: Which battery models is this 21V PCB protection circuit board compatible with?
A: This protection board is compatible with 21V battery packs including BL1830, BL1840, BL1850, BL1860B, and LXT 400 series models. Always verify your battery model number before purchasing to ensure compatibility.
Q: How many INR18650 battery cells does this board support?
A: This PCB protection board is designed to support up to 10 INR18650 battery cells, making it suitable for rebuilding standard 21V battery packs for power tools.
Q: Is this board suitable for a DIY battery pack rebuild?
A: Yes! This board is specifically designed to aid in the repair and reassembly of existing 21V battery packs. It is ideal for DIY enthusiasts and technicians who want to restore or upgrade their power tool batteries without purchasing a brand-new pack.
Q: Are screws included with the protection board?
A: No, screws are not included in the package. You will need to source any required screws or fasteners separately when assembling your battery pack.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.