# BMS Module 2S, 4A, Lithium, 7.4V

- Page: https://sigmanortec.ro/en/bms-module-2s-4a-lithium-74v
- Price: 9.09 RON
- Availability: In stock; 1-2 zile
- Reference: 9371 · EAN: 5944710716279
- Category: Electronic components > Modules for Batteries > BMS Boards
- Specifications: Technology: Lithium Ion; Load voltage: 8.4VDC; sway: Not; Number of cells: 2S
- Package (shipping data): 0.002 kg
- Updated: 2026-09-23
- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Prices: RON, VAT included; prices and stock as of 2026-10-22 04:49 (Europe/Bucharest)

## Description

The 2S BMS module protects 7.4V Li-ion packs with 2 18650 cells, providing safe charging and discharging, overcurrent and short circuit protection. Supports current up to 4A, has MOSFET with internal resistance below 22mOhm for low losses, mounts directly over the cells, operates between -40 and 80C.
BMS module for protecting Lithium-ion batteries with a nominal voltage of 3.7V. This module offers charging and discharging, current and short circuit protection.
Its shape lends itself to being placed directly over two 18650 cells.
Specifications:
Battery voltage: 7.4V
Charging voltage: 8.4VDC
Number of cells: 2
Maximum current: 4A
MOSFET internal resistance: <22mΩ
Load protection: 4.3VDC
Delay: 1s
Recovery voltage: 4.05VDC
Discharge protection: 3.0VDC
Delay: 128ms
Recovery voltage: 3.2VDC
Current protection: 9.8Ah
Detection voltage: 200mV
Delay: 12ms
Recovery: automatic
Operating temperature: -40 - 80°C
Dimensions mm: 35 x 17mm