2S 3A Li-ion Lithium Battery 7.4V 8.4V 18650 Charger Protection Board Module

The 2S 3A Li-ion Lithium Battery Charger Protection Board Module is a compact power management PCB designed for safe charging and protection of 2-cell 18650 lithium battery packs. It integrates charging control and battery protection functions to manage charge current up to 3A, balance cells, and prevent overcharge, over-discharge, and short circuits for reliable battery operation.

This module is suitable for battery powered projects, DIY electric devices, portable electronics, power tools, and custom battery pack assemblies. The board’s balanced charge design and built-in safety features ensure stable charge performance and long battery life in Li-ion systems.

KEY FEATURES

• Designed for 2S Li-ion battery packs
• Charge current up to 3A
• Cell balancing function
• Over-charge protection
• Over-discharge protection
• Short circuit protection
• Compact PCB module
• Suitable for 7.4V/8.4V battery packs

SPECIFICATIONS

• Battery Configuration = 2S (2 cells in series)
• Nominal Voltage = 7.4V
• Charge Voltage = 8.4V full charge
• Charge Current = Up to 3A
• Protection Functions = Over charge/Over discharge/Short circuit
• Balancing = Cell balancing support
• Operating Temperature = Standard battery range
• Mounting Type = PCB module

INTERFACES

• B+ = Battery pack positive input
• B- = Battery pack negative input
• P+ = Pack output positive/charger positive
• P- = Pack output negative/charger negative
• C1 = Cell1 balance/monitor connection
• C2 = Cell2 balance/monitor connection