2S Li-ion 18650 7.4V 4A 2 series BMS Module

2-Series (2S) Battery Protection: Engineered specifically for 2-cell 18650 lithium-ion / LiPo battery setups operating at nominal 7.4V and peak 8.4V charging voltage.

4A Continuous Discharge Rate: Supports up to 4A continuous discharge current with up to 7A peak surge current, ideal for low-to-medium power portable devices.

Compact Oval Board Profile: Space-saving PCB shape with clearly marked solder pads (B+, B-, BM, P+, P-) fits easily inside small project enclosures and custom battery enclosures.

Automatic Multi-Protection Safety: Integrated protection control circuitry provides instant hardware-level cutoffs against overcharging, over-discharging, overcurrent, and short circuits.

Ultra-Low Energy Draw: Ultra-low static current consumption ensures minimal self-discharge, preserving battery capacity during extended standby periods.

Board Material: High-grade FR-4 glass epoxy PCB equipped with dual power MOSFETs and dedicated battery protection IC.

Technical Specifications:

Series Configuration: 2S (2 Cells in series).

Nominal / Max Voltage: 7.4V nominal / 8.4V max charge voltage.

Continuous Discharge Current: Up to 4A.

Peak Surge Current: Up to 7A.

Board Color: Blue PCB.

Usage Advice: Connect the center balance node ($\text{BM}$) between Cell 1 and Cell 2 to ensure both cells are monitored correctly.

Maintenance: Store extra modules in an antistatic bag and protect from loose metal fragments that could bridge contact pads.

Essential Compact 2-Cell BMS: Position as the ideal lightweight protection module for small DIY electronics, handheld tools, rechargeable LED flashlights, and 7.4V battery pack repairs.

Highlight Battery Longevity: Emphasize how integrated over-discharge and short circuit protection prevents permanent cell damage, extending overall battery lifespan.

Recommended Cross-Sell Add-ons: Pair with 2S 10A 7.4V 18650 lithium battery protection board, HX-2S-A2 Circular 2S 8.4V BMS 18650 Lithium Battery Protection Plate, 18650 BMS Board 3S 25A Balanced 12.6V, and ESD antistatic mat 50x40CM PCB Welding Mat.

Featured Collection Star: Display prominently on your Hardware Battery Management System collection page as your compact 2S 4A protection board option.