, No Original, No Battery Cell !!!!!! This product is component without battery core . 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. It can fill 6 pieces of 18650 power Li-ion batteries. But there is no battery inside. Notes:After combining the battery pack and this protective board, if there is no voltage output during the initial power on, please activate it with a dedicated charger. Precautions for use and assembly: 1) When welding battery leads/sampling points, be careful not to connect them incorrectly or in reverse. If a wrong connection is found, the circuit board may have been and needs to be retested before it can be used again. 2) During assembly, the should not directly contact the of the battery cell to avoid damaging it. The assembly should be firm and reliable. 3) Electronic devices used for welding must be reliably grounded, and attention should be paid to electrostatic protection to prevent damage to the protective board caused by electric leakage and static electricity. 4) Be careful not to touch the components on the circuit board with lead wires, soldering iron, etc. during use, otherwise it may burn out the circuit board. Please follow the design parameters and usage conditions during use, and do not exceed the specified values, otherwise it may damage the protective board! Note: PCB design may change with the same function and performance guaranteed. Color: Black & Red Material: plastic Package Contents: 1 x Li-ion Battery Case 1 x PCB Circuit Board(The color of the protection board is random, no specified color is accepted) Only the above package content, other products are not included. 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.