? 2S 20A 8.4V Balanced Li-ion Battery Charger Protection Module (BMS)

This 2S 20A 8.4V BMS Protection Module is a high-current, balanced version lithium battery management system designed to protect 2-cell (7.4V nominal) 18650 lithium-ion battery packs. It provides overcharge, over-discharge, over-current, short circuit protection and includes cell balancing to ensure uniform voltage across cells.

✅ Key Features

• ⚡ Supports up to 20A discharge current, ideal for high-power applications
• ? Balanced charging enhances battery lifespan and efficiency
• ? Integrated protections: Overcharge, Overdischarge, Overcurrent, and Short Circuit
• ? Compact design for space-constrained applications
• ? Easy to install and integrate in DIY battery-powered projects

? Technical Specifications

• Model: 2S Li-ion – 7.4V to 8.4V
• Overcharge Detection Voltage: 4.2V – 4.3V
• Over-discharge Detection Voltage: 2.5V – 2.6V
• Maximum Working Current: 20A
• Overcurrent Protection: 25A
• Static Current: ≤ 18μA
• Internal Resistance: ≤ 7mΩ
• Balance Activation Voltage: 4.17V – 4.2V
• Balance Current: 100mA
• Operating Temperature: -10℃ to +50℃
• Size: Approx. 48.4mm × 20.1mm × 4mm

? Package Includes

• 1 × 2S 20A 8.4V Lithium Battery Protection Module (BMS) – Balanced Version

This BMS board is perfect for high-current 2S battery packs in e-bikes, power banks, robotics, and other DIY electronics projects.