HW-391 2S 20A BMS Module – 18650 Lithium Battery Protection Board

Build or maintain compatible battery projects with this 2S BMS module designed for 18650 lithium battery configurations. The HW-391 supports 2S setups with stated 7.4V/8.4V operation and a 20A rating. Available in standard and balance module variants, it provides options for different compatible DIY battery applications. Choose from 1–5 pieces to suit individual projects or keep additional modules ready for future builds.

Key Features

• Designed for 2S 18650 battery setups.
• Stated 20A rating.
• 7.4V/8.4V configuration.
• Standard & balance versions available.
• Compact 18650 protection board.
• 1–5 piece quantity options.
• Suitable for compatible DIY battery projects.

Why Choose Our HW-391 BMS?

The HW-391 BMS combines battery management functionality with a compact board design for compatible 2S lithium battery assemblies. Standard and balance variants let you select the configuration that best matches your project requirements.

Perfect For

• 2S 18650 battery packs
• DIY electronics
• Battery pack projects
• Electronics repair
• Hobby builds
• Replacement BMS boards

Product Specs

• Model: HW-391
• Configuration: 2S
• Voltage: 7.4V/8.4V
• Current Rating: 20A
• Versions: Standard/Balance
• Quantity: 1–5 Pieces

Complete Your Battery Project

Choose the appropriate lithium battery protection board variant for your compatible 2S 18650 setup.