18V 21V 100A Lithium BMS Protection Circuit Board for 3S 4S 5S Li-Po Batteries

Lithium battery BMS protection circuit board in a DIY kit format, designed for use in computer-related battery systems. Operates from -40 to +85 °C and fits voltage-regulator power supplies. Model name Protection Circuit Board, brand TZT. The board is customizable and supplied as an integrated-circuit module for hobbyist or repair projects.