Overcharge and discharge protection to prevent overcharging and deep discharging of the battery. Overcurrent protection to prevent abnormal high current from damaging the battery. Balance protection ensures cell voltage balance for extended battery life. Stable heat dissipation through aluminum substrate design enhances safety. Suitable for most power tools, electric scooters, electric bicycles, electric tricycles, electric motorcycles, electric vehicles, and other applications.Model: 17S 50A ternary Product dimensions: 125 x 65 x 10mm Port type: Same port Continuous discharge current: 40A / 50A / 60A Discharge overcurrent protection threshold: 2-3 times the continuous current Overcharge protection voltage: 4.25V Overcharge release voltage: 4.19V Over-discharge protection voltage: 2.8V Over-discharge release voltage: 3.0V Balance activation voltage: 4.2V Balance current: 100mA Temperature protection: Discharge cutoff at 75C; Charge cutoff at 55C Operating temperature range: -20C to +70C Material: PCB + Metal Color: Silver Package contents: 1 x Battery protection board 1 x Cable Note: Light reflection and different display settings may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3cm.