Detail:<br> 1. Built-in dual ICs detect the voltage of each battery. And remember the number of uses.<br> 2. Each battery can be detected and protected. Overheating protection, overvoltage protection, undervoltage protection, overcurrent protection, overload protection.<br> 3. The new Makita series realizes low-voltage shutdown. Cooperate with many power tool factories!<br> 4. Stable quality and shock resistance. It is the best partner for Makita torque wrenches, impact drills and angle grinders.<br> 5. Color: Green<br> 6. 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: >602<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 kernel, 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> Package Included:<br> 1 x PCB circuit boardOnly PCB board, other accessories not included<br>