1、This protection board adopts dedicated lithium battery protection chips as central control, featuring high integration and high sensitivity. 2、Protect battery against overcharge, overdischarge, overcurrent, short circuit through detecting current and voltage of each battery. 3、Parameters can be adjusted by external circuit. 4、The scheme design of the protection board is mature and the quality is excellent. 5、Suitable for the battery pack of 3S 18650 lithium battery cordless drills. 3 x Lithium Battery Protection Board Item Type: Lithium Battery Protection BoardCharging Voltage: 12.6VSingle Battery Charging Voltage: 4.225VContinuous Discharge Current: 0-7ADischarge Loop Internal Resistance: ≤50±5mΩSize: 34x34mm / 1.34x 1.34inOvercharge Protection: Detection Voltage: 4.2± 0.05VProtection Delay: 1SSingle Battery Recovery Voltage: 4.0VProtection Release Delay: 20mSOverdischarge Protection: Detection Voltage: 2.7VProtection Delay: 1SSingle Battery Recovery Voltage: 3.0VProtection Release Delay: 20mSOvercurrent Protection: Detection Voltage: 0.1VDetection Current: 18±3ADetection Delay: 10mSState Recovery: Automatic RecoveryShort Circuit Protection: Detection Delay: 280uSDetection Voltage: 0.5VState Recovery: Automatic Recovery after Disconnecting LoadPower Consumption: Working State: 20uA(25℃)Sleep State: 6uA(25℃)