5s Bms 3mos 18650 Drill 18V Lithium Battery Charging 21V PCBA Hand Electric Power Tool Accessories

see the photo

Above is a patch style NTC.It stands for RT1, RT2, RT3 or RT.Due to the upgrade of products will change, such as NTC style, electronic components bms color and so on.It cannot be a condition of dispute.Certain professional knowledge is required to weld, if the welding error will cause short circuit damage components, in this case, there is no refund.

The NTC There are two styles, patch style and plug-in style, neither of which will affect the work.If it is a plug-in linear NTC, just attach it to the battery body.

The BMS 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
Overcharge Protection Delay 1S
Overcharge Single Cell Recovery Voltage 4.13V
Overcharge Protection Release Delay 1mS
Over-discharge Protection Over-discharge Single Cell Detection Voltage 2.8V
Over-discharge Protection Delay 1S
Over-discharge Single Cell Recovery Voltage 3.0V
Over-discharge Protection Release Delay 100±20mS
Over-current Protection Over-current Detection Voltage 0.4V
Over-current Detection Current 30±5A
Over-current Detection Delay 1S
Recovery State Auto
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 Protection Protection Temperature 70±5°
Recovery Temperature 55±5°
Power Consumption Working State 25uA (25°)
Stand-by State 6uA(25°)
Internal Resistance Discharge Main Circuit Internal Resistance 30±5mΩ
Temperature Operating Temperature -40°-85° RH≤75%
Store Temperature -40°-125° RH≤75%