No Cell, PCB Board Circuit Board For Bosch 12V 10.8V Li-ion Battery. ,No Battery Cell ! It is used to repair and assemble batteries pack. Only for people who are familiar with battery performance and have practical experience in battery assembly. 1. What should be paid attention to when assembling tool battery pack? 18650 power cell, model, voltage, internal resistance should be consistent, consistency is better, 10.8V 3 strings, 14.4V 4 strings, 18V 5 strings. The voltage detection line must be connected to the detection line. Try to use better batteries instead of dismantling the electric core. Need spot welder. 2. When the protective plate is used to replace the Before changing the protection board, be sure to measure the voltage of each group of 18650 cells to ensure that the cell voltages are consistent. The protection board only plays a protective role and cannot balance the voltage. The battery cannot be charged or discharged due to the inconsistent voltage of the battery pack. It is useless to replace the protection board. It is recommended to use 18650 batteries. Please be kindly noted: If you have any objection to the following two items, please do not order! (1). PCB color may be any color according to our stock, (2). PCB design may change with the same function and performance guaranteed. (3). The number and position of components on the PCB may change and be adjusted Colour: random color , don't accept the specified color Material:PCB Different batches may have different silk-screen characters, but will not affect the use Package Contents: 3 x BAT411 Li-ion Battery Case