The 2S Lithium-ion Battery Protection BMS Board – 7.4V 3A is a compact battery protection and management module designed for two lithium-ion cells connected in series. It is suitable for building 2S battery packs with a nominal voltage of 7.4V and a fully charged voltage of approximately 8.4V. The BMS monitors the individual cell voltages and helps protect the battery pack against overcharging, over-discharging, excessive current, and short-circuit conditions, making it suitable for rechargeable battery applications requiring basic protection and safer operation.
The board is designed for a 2S configuration, meaning two compatible 3.7V nominal lithium-ion cells are connected in series. During charging, the BMS monitors the battery pack and individual cell voltages and disconnects the cells from the charger when an overcharge condition is detected. During discharge, it helps prevent the cells from being discharged below their specified protection threshold. This makes the module suitable for battery packs assembled using 18650 cells and other compatible cylindrical lithium-ion cells.
The 2S 3A BMS provides protected positive and negative output connections for connecting the battery pack to a load and suitable charger. The board incorporates electronic protection components that automatically disconnect the battery when abnormal electrical conditions occur. Proper connection of the battery cells to the B+, BM/B1, and B- terminals is essential for correct operation, and the battery cells used in the pack should be compatible and properly matched.
Designed for electronics hobbyists, battery-pack builders, robotics enthusiasts, engineers, technicians, and DIY makers, the 2S Lithium-ion Battery Protection BMS Board is suitable for rechargeable battery packs, portable electronics, LED systems, small robotics projects, DIY power supplies, IoT devices, RC projects, and other applications requiring a protected 2-cell lithium-ion battery pack. It provides a compact and economical protection solution for low-to-medium current 2S battery applications.
2S Lithium-ion Battery Protection BMS Board
Designed for 2-Series Lithium-ion Cells
7.4V Nominal Battery Pack Voltage
8.4V Fully Charged Battery Voltage
3A Current Rating
Overcharge Protection
Over-Discharge Protection
Overcurrent Protection
Short-Circuit Protection
Individual Cell Voltage Monitoring
2S Battery Configuration
Suitable for 18650 Lithium-ion Cells
Protected Battery Output
B+ Battery Positive Connection
BM / B1 Cell Junction Connection
B- Battery Negative Connection
P+ Protected Positive Output
P- Protected Negative Output
Suitable for Rechargeable Battery Packs
Ideal for DIY Battery Pack Assembly
Suitable for Portable Electronics
Ideal for IoT Projects
Suitable for LED Applications
Perfect for Small Robotics
Suitable for DIY Power Supplies
Ideal for Battery-Powered Devices
Suitable for RC Projects
Excellent for DIY Electronics
Easy to Integrate
Compact Space-Saving Design
Low-Cost Battery Protection Solution
Suitable for Educational Projects
Useful for Battery Pack Prototyping
Suitable for Low-to-Medium Current Applications
Orders placed before 3 PM IST will be shipped on the same day (excluding Sundays and Public holidays) through our shipping partners. In rare cases, the pickup may get delayed during Public holidays / Bandh / Environmental disturbances.
