18650 BMS Board 3S 40A Balanced 12.6V

High-Current 3-Series (3S) Lithium Protection: Optimized for 3-cell 18650 lithium-ion / LiPo battery configurations operating at nominal 11.1V and peak 12.6V charging voltage.

Integrated Cell Balancing Circuitry: Features active passive cell voltage equalization during charging to keep all cells balanced, extending battery pack cycle life and performance.

40A Continuous Discharge Capability: Delivers up to 40A continuous output current with enhanced heat dissipation, ideal for high-power motors, inverter systems, and power tools.

Multi-Layer Hardware Protection: Built-in automatic protection against overcharging, over-discharging, short circuits, and overcurrent to prevent battery damage and safety hazards.

Heavy-Duty High-Current Trace Layout: Designed with thick copper traces and low-internal-resistance MOSFETs to withstand high starting surge currents without excessive voltage drop.

Board Material: High-grade FR-4 glass epoxy printed circuit board with high-power SMT MOSFETs and balance circuitry.

Technical Specifications:

Series Configuration: 3S (3 Cells in series).

Charging Voltage: 12.6V - 13.6V DC.

Continuous Discharge Current: Up to 40A.

Balance Function: Yes (Integrated passive cell balancing).

Board Color: Green PCB.

Usage Advice: Ensure all 3 lithium cells are pre-balanced to equal voltage levels before connecting them to the BMS board solder pads.

Maintenance: Ensure adequate airflow or heat dissipation when operating near the 40A maximum continuous load limit.

Essential High-Power 3S Module: Position as the go-to upgraded protection board for heavy-duty 12V lithium power packs, high-drain cordless power tools, electric scooters, and solar storage banks.

Highlight 40A Output & Balancing: Emphasize how the 40A continuous current rating and integrated cell balancing provide reliable power delivery and long-term battery cell health.

Recommended Cross-Sell Add-ons: Pair with 18650 BMS Board 3S 25A Balanced 12.6V, 3S 20A Li-ion Battery 18650 BMS Board 12.6V, 18650 BMS Board 4S 40A Balanced 16.8V, and ESD antistatic mat 50x40CM PCB Welding Mat.

Featured Collection Star: Display prominently on your Hardware Battery Management System collection page as your high-current 3S 40A balanced protection board.