Item Type: Lithium Battery Protection Board_x000D_ Material: PCB_x000D_ Load Voltage: 19V 21V_x000D_ Single Charging Voltage: 3.8V 4.25V_x000D_ Continuous Discharge Current: 8-20A_x000D_ Overload Single Section Detection Voltage: 3.85-4.25V_x000D_ Overload Protection Delay: 1s TZT_x000D_ Overload Single Section Recovery Voltage: 3.75-4.13V_x000D_ Overload Protection Release Delay: 1ms_x000D_ Single Overdischarge Detection Voltage: 2-2.8V_x000D_ Overdischarge Protection Delay: 1s_x000D_ Single Overdischarge Recovery Voltage: 2.5-3.0V_x000D_ Overdischarge Protection Release Delay: 100ms20ms_x000D_ Overcurrent Detection Voltage: 0.1-0.4V_x000D_ Overcurrent Detection Current: 305A_x000D_ Overcurrent Detection Delay: 1s_x000D_ Recovery Status: Automatic_x000D_ Support TZT: Yes_x000D_ Short Circuit Detection Delay: 250us_x000D_ Short Circuit Release Delay: 1s_x000D_ Short Circuit Detection Voltage: 0.8V_x000D_ Recovery Status: Automatic after load disconnection_x000D_ Protection Temperature: 705_x000D_ Recovery Temperature: 555_x000D_ Working State: 25ua (25)_x000D_ Standby Mode: 6ua (25) TZT_x000D_ Internal Resistance of Main Discharge Circuit: 305m_x000D_ Operating Temperature: -40 to 85RH 75%_x000D_ Storage Temperature: -40 to 125RH 75%_x000D_ Size: Approx. 40x46mm/1.6x1.8in