Features: This battery protective board delivers high stability and safety with features like overcharge/overdischarge prevention, automatic balancing, and efficient cooling to extend battery life PCB board, good heat dissipation. It is suitable for 18650, 21700 and other cylindrical batteries, and is component for upgraded or repair 36V battery pack. Ideal for battery pack assemblers, and professional seeking dependable protective in projects involving electric vehicles or portable solution. Perfect for applications in electric bikes, energy storage units, and other device where battery management functionality is essential for safety and longevity. Its intelligent battery automatically detects and correct imbalances during charging, discharging, and idle states to maintain cell health and prolong overall life. Specifications: Component:Plastic Current:15A/20A/40A/60A/100A/200A/150A Size:As shown in picture Package Includes: 1Pc Protective board note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.