2S 7.4V 8.4V 18650 Li-ion lithium battery protection board BMS 20A protect module with balance

This BMS (Battery Management System) board is designed for 2S Li-Ion battery packs (7.4V nominal, 8.4V fully charged) made from 18650 or similar cells.

It provides full protection against:

• overcharge

• over-discharge

• overcurrent

• short circuit

The built-in balancing function ensures equal voltage distribution between cells during charging, improving performance and extending battery lifespan.

Suitable for battery packs used in power tools, LED systems, portable devices, and DIY electronics.

 Key Features:

• ✔️ Supports 2S Li-Ion battery packs

• ✔️ Cell balancing function

• ✔️ Overcharge protection

• ✔️ Over-discharge protection

• ✔️ Short circuit protection

• ✔️ Overcurrent protection

• ✔️ Compatible with 18650, 26650, Li-Po

 Technical Specifications:

• Configuration: 2S

• Nominal voltage: 7.4V

• Charging voltage: 8.4V

• Continuous current: up to 20A

• Peak current: ~25A

• Charge current: up to ~10A

• Balancing: yes

• Size: ~45–48 mm

 Advantages:

• Extends battery life with balancing

• Improves safety and reliability

• Prevents battery damage

• Compact and easy to use

• Ideal for DIY and professional use