BMS PCB Protection Board for DeWalt 20V FlexVolt 60V 21700

BMS PCB Charging Protection Board for DeWalt 20V & FlexVolt 60V Battery Packs

Repair, rebuild, or assemble your DeWalt 20V and FlexVolt 60V lithium battery packs with this high-quality BMS (Battery Management System) PCB Protection Board. Compatible with DeWalt DCB606, DCB609, and DCB612 battery models, this board is designed to house and protect 15 × 21700 lithium-ion cells in a complete battery pack assembly. Whether you're an experienced battery technician or a skilled DIY enthusiast, this protection board makes restoring your power tool batteries straightforward and cost-effective.

Made in Mainland China.

Please Note: This listing is for the protection board only — no battery cells, no charger, and no original DeWalt components are included. This product is intended for individuals with practical experience in battery assembly and lithium cell safety. Improper assembly can be hazardous.

Key Features

• ✅ Compatible with DeWalt DCB606, DCB609, DCB612 — fits DeWalt 20V MAX and FlexVolt 60V battery platforms
• ✅ Fits 15 × 21700 Li-ion Cells — supports high-capacity cell configurations for maximum runtime
• ✅ Full BMS Protection — overcharge, over-discharge, short-circuit, and overcurrent protection built in
• ✅ Brand New, 100% Non-OEM — aftermarket quality replacement, not a refurbished part
• ✅ PCB + Plastic Construction — durable materials for long-lasting performance
• ✅ For Experienced Assemblers — ideal for battery repair shops, technicians, and advanced DIYers

Specifications

Important Assembly Instructions

1. Correct Polarity is Critical: When welding battery leads and sampling points, double-check connections for correct polarity. Reversed connections can permanently damage the protection board.
2. Avoid Direct Cell Contact: The BMS board must not directly touch the surface of battery cells during assembly to prevent short circuits or cell damage.
3. Ground Your Equipment: All soldering and electronic tools must be reliably grounded. Use proper ESD (electrostatic discharge) protection to avoid damage from static electricity.
4. Keep Leads Clear of Components: Do not allow battery leads, soldering iron tips, or other conductive tools to contact PCB components during assembly.
5. Protect from Moisture & Static: Store and assemble in a dry, anti-static environment. Keep the board away from water and humidity at all times.
6. Initial Activation: After assembly, if no voltage output is detected on first power-on, activate the battery pack using a compatible DeWalt charger.

What's in the Box

• 1 × BMS PCB Battery Charging Protection Board
• No battery cells, no charger, no original DeWalt components included.

Note: PCB color, screen printing, and version number may vary between production batches and according to current inventory. These variations do not affect functionality. Measurement tolerance: ±1–3 cm.

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For more information on lithium-ion battery safety, refer to the U.S. Occupational Safety resources or the UL battery safety guidance. For general electronics safety standards, visit CPSC.gov.

Frequently Asked Questions

Q: Is this BMS protection board compatible with all DeWalt 20V MAX batteries?

A: This BMS PCB is specifically designed to be compatible with DeWalt DCB606, DCB609, and DCB612 battery packs (20V MAX and FlexVolt 60V platforms) that use 21700 lithium-ion cells in a 15-cell configuration. It may not be compatible with other DeWalt models that use different cell counts or sizes.

Q: Are battery cells included with this protection board?

A: No. This listing is for the BMS PCB protection board only. You will need to source 15 × 21700 lithium-ion cells separately. No charger, battery cells, or original DeWalt components are included.

Q: What does a BMS (Battery Management System) protection board do?

A: A BMS protection board monitors and manages the charging and discharging of lithium-ion battery cells. It provides critical protections including overcharge protection, over-discharge protection, short-circuit protection, and overcurrent protection, helping extend battery life and ensure safe operation.

Q: Can beginners use this product for battery repair?

A: This BMS board is intended for individuals with practical experience in lithium battery assembly and electronics soldering. Improper assembly of lithium-ion battery packs can be dangerous. We strongly recommend this product only for experienced technicians or battery repair professionals.

Q: Why is there no voltage output when I first assemble my battery pack?

A: Some BMS protection boards enter a sleep or protection mode after initial assembly and may show no voltage output until activated. To activate the battery pack, connect it to a compatible DeWalt charger (designed for 20V or FlexVolt 60V packs). This should wake the BMS and allow normal operation.