BMS 5S 18V 21V 20A 18650 Lithium Battery Charging Protection Board Circuit PCM Balancer Power Bank Charger Module For Power Tool Features : The protection board is for 5 series Li-ion batteries, mainly used for electric power tools. It uses special IC for 5S lithium batteries as processor to detect real-time voltage, charge and discharge current and ambient temperature of each battery. Stable various protective functions for charging and discharging, such as overcharge protection, over-discharge protection and short circuit protection. Low power consumption,the working current is about 25uA and quiescent current is about 6uA. Choosing the correct protection board and applying it appropriately is vital to the longevity your batteries. Specifications : Charge Voltage:19/21V Single Cell Charge Voltage:3.8/4.25V Continuous Discharge Current:8-20A Overcharge Single Cell Detection Voltage:3.85-4.25V Overcharge Protection Delay:1S Overcharge Single Cell Recovery Voltage:3.75-4.13V Overcharge Protection Release Delay:1mS Over-discharge Single Cell Detection Voltage:2-2.8V Over-discharge Protection Delay:1S Over-discharge Single Cell Recovery Voltage:2.5-3.0V Over-discharge Protection Release Delay:10020mS Over-current Detection Voltage:0.1-0.4V Over-current Detection Current:305A Over-current Detection Delay:1S Short Circuit Protection Support:Yes Short Circuit Detection Delay:250uS Short Circuit Release Delay:1S Short Circuit Detection Voltage:0.8V Recovery State:Auto after Disconnect Load Over Temperature ProtectionProtection Temperature:705 Recovery Temperature:555 Working State:25uA (25) Stand-by State:6uA(25) Discharge Main Circuit Internal Resistance:305m Operating Temperature: -40-85 RH75% Store Temperature: -40-125 RH75% SizeLength x Width:45x40mm/1.77*1.57" Package Included: 1* Battery Charger Protection Board Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data. _x000D_ _x000D_