General description This product is a plastic case shell designed for assembling and repairing batteries. It is specifically intended for individuals who are knowledgeable about battery performance and have practical experience in battery assembly. The case can accommodate up to 10 pieces of 18650 Li-ion batteries. Please note that this is just the shell; no battery core is included. Technical specifications Type: Battery Storage Box Model Number: Not specified Color: Black+Yellow Material: Plastic Package Contents: 6 x Battery Box (with accessories), 6 x PCB Board (color is random) Measurement allowed error: +/- 1-3 cm Other information This product does not include any batteries. Light reflection and different displays may cause the color of the item to differ slightly from the actual product.