Overcharge and discharge protection to prevent overcharge and discharge of the battery. Overcurrent protection to prevent abnormal high current from damaging the battery. Balance protection ensures battery voltage balance, helping extend battery life. Stable heat dissipation through aluminum substrate design. Safety protection features include resistance to high voltage, reduced MOSFET breakdown risk, and ultra-low internal resistance MOSFET. Suitable for most electric tools, electric bicycles, electric tricycles, electric motorcycles, electric vehicles, and similar applications. Product name: Lithium Battery Protection Board Model: 13 Series 20A, Same Port, with Balancing Belt, Disconnection Protection Product Type: 13S 20A Same Port Discharge Current: 20A Discharge Overcurrent Protection Value: 3-5 Times Continuous Current Main Circuit Conduction Internal Resistance: Less than 20m Ohm Charging Current [Same Port]: 6A / 6A / 6A / 10A Charging Overcurrent Protection: One Fifth of Discharge Overcurrent Charging Voltage: Number of Cells in Ternary Battery Pack × 4.2V Applicable Battery Type: Ternary Polymer Product Dimensions: 60 x 52 x 10mm Color: Silver Material: PCB + Metal Package Contents: 1 x Battery Protection Board 1 x Flat Cable Note: Light reflection and display differences may cause slight variations in color. Measurement error allowance is +/- 1-3cm.