Detail: 1. Built-in dual ICs detect the voltage of each battery. And remember the number of use.<br>2. Each battery can be detected and protected. Overheating protection, overvoltage protection, undervoltage protection, overcurrent protection, overload protection.<br>3. FOR The new series realizes low-voltage shutdown. Cooperate with many power tool factories!<br>4. Stable quality and shock resistance. It is the best partner for torque wrenches, impact drills and angle grinders.<br>5. Suitable for BL1850B/BL1840B lithium battery pack.<br>Specifications:<br>High discharge rate: 15A<br>Maximum discharge current: continuous 60A, pulse a<br>Discharge termination voltage: 13.75V<br>Overcharge protection voltage: single cell 4.25v0.025v<br>Overcharge protection recovery voltage: 4.1V0.025v<br>Over-discharge protection voltage: single cell 2.7V0.08v<br>Over-discharge protection recovery voltage: single cell 3.0V0.08v<br>High temperature charging protection: Greater than602<br>Discharge overcurrent protection 1: 100A/1s delay protection<br>Discharge overcurrent protection 2: 180A/100ms delay protection<br>Short circuit protection: 200A<br>Preparation before assembly:<br>1. If using a new , please note:<br>A. Must choose power lithium battery,<br>B. A set of six iron cores must be equipped with resistors and capacitors to make their voltages equal.<br>2. If the old battery is repaired, please test the voltage of each battery. If the voltage is different, charge each battery to the same voltage value.<br>Very important:<br>Before soldering the PCB, make sure each battery has the same voltage.<br>Please note: the physical slightly color difference or difference, number or different, but does not affect the use, please do not mind, thank you!<br>Material: plastic<br>colour: Green<br>Package Contents:<br>1 x PCB circuit board(Only PCB board, other accessories not included)<br>Only the above package content, other products are not included.<br>Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.