Replacement BMS PCB Protection Circuit Board for 18V Lithium-Ion Power Tool Batteries

Restore failing tool battery packs and bring tired cordless equipment back to life with a dependable replacement control board. Designed for standard 18V slide-style lithium-ion battery assemblies, this replacement BMS PCB battery protection circuit board delivers balanced charging, continuous cell monitoring, and essential safety control for custom pack rebuilds and battery repairs. Built with a high-accuracy battery management system (BMS), it actively balances voltage across all connected cell series to prevent premature cell deterioration and maximize runtimes. The onboard circuitry incorporates multi-tier safety protections against overcharging, deep over-discharge, short-circuits, and high current draw. Engineered with heavy-duty copper traces and clearly labeled solder pads, this lithium-ion battery charging circuit board module provides smooth solder flow and hassle-free installation for workshop battery refurbishment.

Key Features

• Active Cell Balancing: Monitors and manages individual cell voltages across the pack to ensure balanced charging and long service life.

• Multi-Stage Protection Circuitry: Integrated safeguards automatically defend against overcharge, over-discharge, short-circuit, and high-amp overload.

• Clear Solder Pad Layout: Precision-labeled connection points make wiring cell taps, thermistors, and power leads straightforward and accurate.

• Heavy-Duty Copper Traces: High-current circuit tracks resist thermal buildup under heavy draw from high-torque drills, saws, and impact drivers.

• Drop-In Form Factor: Dimensions and mounting holes align accurately inside standard 18V slide-style battery housings.

• Cost-Saving Rebuild Solution: Replaces fried or locked circuit boards so you can keep working with existing battery shells and good cells.

Product Specs

• Compatibility: Standard 18V slide-style lithium-ion battery packs (Bare PCB Only; Battery Cells and Case Not Included)

• Board Type: Multi-cell lithium-ion Battery Management System (BMS) PCB

• Protection Functions: Overcharge, over-discharge, over-current, and short-circuit protection

• Substrate: High-durability FR-4 fiberglass composite with heavy copper plating