Features: brand new and high quality The protection board is for 5 series Li-ion batteries, mainly used for electric power tools. It uses special ICfor5S 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: Material:ABS Operating voltage: 18V Charging current: 1-3A Discharge current: 10A (adjustable) Overdischarge protection current: 35±10A Charging voltage: 21-24V Size:Approx.46x46mm/1.81x1.81inches Package Includes: 1x Battery Charger Protection Board note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.