? 2S 5A 18650 Li-ion Battery Protection Board BMS – Overcharge, Overdischarge & Short Circuit Protection

The 2S 5A BMS Protection Board is designed to safeguard 2-cell (7.4V nominal) 18650 lithium-ion battery packs. It features comprehensive protection functions including overcharge, over-discharge, over-current, and short circuit protection. Thanks to its built-in MOSFETs and precision voltage detection circuits, this module ensures both battery safety and long life.

✅ Key Features

• ? High-precision voltage detection for each cell
• ⚡ Triple overcurrent detection circuit for enhanced safety
• ? Supports 3.7V lithium-ion battery cells in 2S configuration
• ? Ultra-low standby current for long-term battery life
• ? Compact design, ideal for space-limited applications

? Technical Specifications

• Charging Voltage Range: 8.4V – 9V
• Overcharge Protection: 4.25V – 4.35V ±0.05V
• Over-discharge Protection: 2.5V – 3.0V ±0.05V
• Maximum Continuous Discharge Current: 5A
• Limit Instantaneous Current: 7A
• Operating Voltage: 7.4V (2S)

? Soldering Instructions

• B+ : Connect to battery pack positive terminal
• B- : Connect to battery pack negative terminal
• MB : Connect to the joint between cell 1 and cell 2
• P+ : Positive terminal for charging/discharging
• P- : Negative terminal for charging/discharging

? Package Includes

• 1 × 2S 5A Li-ion Battery Protection Board (BMS)

This BMS module is perfect for DIY 2S lithium-ion battery packs in portable electronics, robotics, and IoT projects.