General description DIY BL1890 Battery Case PCB Charging Protection Board Shell Box is designed for assembling and repairing battery packs. This product is specifically for those who are knowledgeable about battery performance and have practical experience in battery assembly. The case can hold up to 15 pieces of 18650 Li-ion batteries and features an LED battery status indicator. Please note that the package does not include any battery cells. Technical specifications Color: Black Material: Plastic Capacity: Holds 15 pieces of 18650 Li-ion batteries Measurement error: +/- 1-3 cm Other information Package Contents: 1 set of Plastic Case (PCB: random color, no color specification accepted) Light reflection and different displays may cause the color of the item in the picture to differ slightly from the actual product.