Devon 5s2p18650 Holder Storage Box 21v 18v Mini Screwdriver Lithium Battery Case for Drill Cordless with BMS Rechargable Washing Pump

Devon 18V electric tool battery storage box with PCB ,TheBMS 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 Charge Voltage: 21V Single Cell Charge Voltage 4.25V Current Continuous Discharge Current 8-20A Overcharge Protection Overcharge Single Cell Detection Voltage 4.25V it can put in 10 pcs 18650 If your original box is not the same as ours, then it cannot be used. The box is fitted with screws and springs Please use 21VDC5521 lithium battery charger, do not charge in the discharge port.