Please note: If you have any objections to the following 4 items, please do not order! (1).PCB color can be any color according to our stock, (2).PCB design can change with the same guaranteed functions and performance. (3).The number and position of components on the PCB can be changed and adjusted. (4).This product does not include after-sales service. We only provide PCBs and buyers need to install them by themselves after purchasing the product! Once you place an order, you agree to the above 4 conditions by default and are not allowed to submit disputes for reasons of "different colors, design changes, wrong version of the goods" and so on. Not original for Makita PCB, but 100% new,No battery cell!!!!!! Specifications: 1.Built-in IC detects the cell voltage and current.and remember the number of uses! 2.Battery detection and protection: overheat protection, overvoltage protection, undervoltage protection, overcurrent protection, overload protection. 3.All series for Makita realize low voltage shutdown.Cooperate with many power tool factories! 4.Stable quality and anti-vibration.It is the best partner for Mlwaukee torque wrench, impact drill and angle grinder, etc. 5.Color: blue, green or red, etc.any color, PCB color and version number are different according to the latest actual inventory. 6.PCB design may change due to changes in supply chain and processing technology. Preparation before assembly: 1.If a new core is used, please note: a.21700 Power lithium battery core should be selected, b.A group of 10 cores should be equipped with resistance and capacitance to make their voltage the same. 2.If the old battery is repaired, please test the voltage at both ends of each cell. If the voltage is different, please charge each cell to the same voltage value. Very important: Make sure the voltage of each cell is the same before soldering the PCB.