4S 40A Lithium-Ion BMS Protection Board (14.4V–16.8V, Balanced)

This 4S 40A BMS (Battery Management System) is designed for 4-cell lithium-ion (3.7V each) battery packs, giving a total voltage range of 14.4V to 16.8V. It features overcharge, over-discharge, overcurrent, and short-circuit protection, along with cell balancing to maintain equal voltage across all cells.
Ideal for high-current DIY battery packs and power systems.

Key Features:

• Supports 4S Li-ion battery packs

• Balanced charging for longer battery life

• Continuous discharge current: 40A

• Overcharge & over-discharge protection

• Overcurrent & short-circuit protection

• Compact PCB design

• Stable performance and long durability

Applications:

• Lithium-ion battery packs

• DIY power banks

• Electric bikes, e-scooters

• Solar storage systems

• Robotics and power modules

Condition:
Brand New – High-Quality Protection Board