BMS 2S Li-ion Battery Protection & Charging Board – 18650 Cells, 7.4V/8.4V, 3A

This BMS 2S Li-ion battery protection and charging board is a compact circuit module designed to manage a two-cell (2S) lithium battery pack built from 18650 cells. Rated for a 7.4V nominal / 8.4V full-charge pack at up to 3A, it handles balanced charging and protects the cells during everyday use. It suits hobbyists, makers, and anyone building or repairing DIY battery packs for small electronics, portable devices, and solar or project-based power setups.

Key features

• BMS 2S configuration for two-cell lithium packs (7.4V nominal, 8.4V full charge)
• Rated for up to 3A — suitable for light to moderate loads
• Designed for standard 18650 Li-ion cells
• Provides protection management for charge and discharge of the pack
• Small, lightweight board that fits neatly inside compact enclosures

Typical uses

• Building or rebuilding DIY 2S 18650 battery packs
• Powering small electronics, LED lighting, and portable gadgets
• Hobby, maker, and robotics projects needing managed lithium power
• Replacement board for worn-out protection circuits

How to choose / tips

Make sure your pack matches the 2S (7.4V/8.4V) rating and that your continuous current stays within the 3A limit. Use only healthy, matched 18650 cells and a charger suited to a 2S lithium pack. Double-check your wiring polarity before powering up, and keep connections clean for reliable performance.

Why tna W rna

At tna W rna we focus on quality components and reliable sourcing so your projects work as expected. Enjoy fast delivery across Egypt and convenient cash on delivery on your order.