5s2p18650 Holder Storage Box 21v 18v Mini Screwdriver Lithium Battery Case for Drill Cordless with BMS Rechargable Washing Pump Screwdriver case 5s2p holder bms nickel 1 set it can put in 10 pcs 18650 If your original box is not the same as ours, then it cannot be used. It needs to look exactly the same before it can be used. The box is fitted with screws and springs Please use 21VDC5521 lithium battery charger, do not charge in the discharge port. The products are constantly updated and improved, and some small components are changed from time to time, such as resistance and diode, but it will not affect the use! Cannot serve as the condition that opens dispute! 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 note: Please allow 1-5 mm differs due to manual measurement. Due to the different display and different light, the picture may not show the actual color of the item. Thanks for your understanding. 1. small Accessories ,PCB and Led color stlye may be any color according to our stock 2. PCB design may change with the same function and performance guaranteed. Once you place an order, you agree to the above two terms by default, and you are not allowed to submit disputes for the reasons of "different colors, design changes, wrong version of goods" and so on. The products are constantly updated and improved, and some small components are changed from time to time, such as resistance and diode, but it will not affect the use!Cannot serve as the condition that opens dispute! From August 6, , the BMS upgraded to 3MOS. If the electronics have changed slightly due to the upgrade. It's normal. _x000D_