Designed for individuals with professional knowledge and experience in battery assembly and performance. Requires assembly tools; you have the necessary equipment before ordering. Ideal for repairing and assembling battery packs, specifically tailored for those familiar with battery technology. components provided; please note that this product does not include battery cells. Not suitable for beginners; practical experience in battery assembly is essential for effective use. This product is a semi-manufactured good intended for the repair and assembly of battery packs. It is crucial that users possess a solid understanding of battery performance and have the appropriate tools for assembly. The components are and do not include any battery cells, making it essential for experienced individuals to handle the assembly process. Color: As Shown Material: plastic Package Contents: 1* Li-ion Battery Plastic Case PCB Charging Circuit Board kit 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.