BMS 2S 7.4V 8A Li-ion Protection Board | Pro Tronix

Product Description

The BMS 2S 7.4V 8A Li-ion Protection Board is a compact, high-efficiency Battery Management System designed to protect 2-series lithium-ion or lithium-polymer battery packs (7.4V nominal / 8.4V full charge). Engineered to manage dual 18650 or LiPo cell setups, this module provides essential protection against overcharging, over-discharging, over-current, and output short circuits, extending overall battery lifespan and ensuring safe operational power delivery.

Featuring low internal resistance MOSFETs and high-accuracy voltage detection circuitry, it maintains stable power delivery up to 8A continuous discharge current—making it an ideal safety circuit for portable power tools, RC models, custom robotics, and DIY 7.4V battery packs.

⚠️ Wiring & Safety Tip: Connect your battery cells strictly in order: B- (0V ground), BM (3.7V midpoint tap), and B+ (7.4V positive). Always check cell voltage balance before assembling into a series pack. Double-check for proper wiring polarity before connecting chargers or loads.

Technical & Architectural Highlights

• Comprehensive Multi-Protection: Shields connected cells against overcharge, over-discharge, short-circuit, and over-current conditions.

• 8A Continuous Discharge Capacity: Efficiently handles continuous currents up to 8A, ideal for moderate power loads and motors.

• Compact PCB Form Factor: Compact footprint easily installs inside custom battery packs, 3D printed housings, and enclosures.

• Low Standby Power Draw: Ultra-low quiescent current consumption preserves stored battery capacity during long idle periods.

🧰 Recommended Batteries & Power Accessories

Completing your custom 2S battery pack or power project? Add these matching batteries and charging essentials to your order:

1. Lithium Battery Protection Boards (BMS): Explore various voltage configurations and current ratings for custom pack assembly: Pro Tronix BMS Modules Collection

2. 18650 & Cylindrical Lithium-Ion Batteries: High-capacity rechargeable cells ideal for building custom 2S battery packs: Pro Tronix Lithium Batteries Collection

3. Lithium Polymer (LiPo) Batteries: Compact single and multi-cell LiPo packs for lightweight portable electronics: Pro Tronix LiPo Batteries Collection

4. 1S – 2S Lithium Battery Charger Modules: Dedicated charging boards and step-up/down power modules for lithium chemistry: Pro Tronix Lithium Charger Collection

5. Battery Holders & Connectors: Secure 18650 battery holders, nickel strips, and wire leads for clean pack assembly: Pro Tronix Battery Holders Collection

Technical Specifications

Applications

• DIY 2S Battery Packs: Custom 7.4V rechargeable power packs using 18650 cells or LiPo pouches.

• Robotics & RC Vehicles: Safe power management for small motor drivers, servos, and micro quadcopters.

• Portable Electronics & Power Tools: Battery protection for handheld gadgets, Bluetooth speakers, and field tools.

What’s in the Box

• 1 x BMS 2S 7.4V 8A Li-ion / LiPo Battery Protection Board.

All your electronics components and prototyping accessories are available with fast shipping across Egypt from Pro Tronix!