Item Type: Lithium Battery Protection Board Charging Voltage: 12.6V Single Battery Charging Voltage: 4.225V Continuous Discharge Current: 0-7A Discharge Loop Internal Resistance: 505mΩ Size: 34x34mm / 1.34x1.34in Overcharge Protection: Detection Voltage: 4.20V Protection Delay: 1S Single Battery Recovery Voltage: 4.0V Protection Release Delay: 20mS Overdischarge Protection: Detection Voltage: 2.7V Protection Delay: 1S Single Battery Recovery Voltage: 3.0V Protection Release Delay: 20mS Overcurrent Protection: Detection Voltage: 0.1V Detection Current: 183A Detection Delay: 10mS State Recovery: Automatic Recovery Short Circuit Protection: Detection Delay: 280μS Detection Voltage: 0.5V State Recovery: Automatic Recovery after Disconnecting Load Power Consumption: Working State: 20μA (25°C) Sleep State: 6μA (25°C) This protection board adopts dedicated lithium battery protection chips as central control, featuring high integration and high sensitivity. Protects battery against overcharge, overdischarge, overcurrent, and short circuit by monitoring voltage and current of each cell. Parameters can be adjusted via external circuit. The protection board features a mature design and high-quality construction. Suitable for 3S 18650 lithium battery packs used in cordless drills. 3 x Lithium Battery Protection Board