The Original 3S 25A Li-ion 18650 BMS PCM Battery Protection Board BMS PCM With Balan is a vital component for electronic devices that use lithium-ion batteries. This board provides protection for the batteries by monitoring their charge and discharge levels, preventing overcharging and deep discharge, and balancing the cells to ensure optimal performance. The 3S 25A rating indicates that it is designed to work with a single string of three lithium-ion batteries, with each battery rated at 25 amps. Perfect for industrial and commercial applications, this BMS PCM board with balancing capabilities ensures reliable and efficient power management.2 BOARDS