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 to extend battery life. Stable heat dissipation through aluminum substrate for reliable performance. Safety protection includes resistance to high voltage, reduced MOSFET breakdown risk, and ultra-low internal resistance MOSFET. Suitable for most electric tools on the market, including power tools, electric bicycles, electric tricycles, electric motorcycles, and electric vehicles. Product name: Lithium Battery Protection Board Model: 13 Series 20A, Same Port, with Balancing Function, 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 20mΩ 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 Compatible 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 different display settings may cause slight color variations between the image and the actual item. Measurement allows an error of +/- 1-3cm.