A. Plastic housing for BL1890 battery (excluding battery cells) and printed circuit board B. It is in a new condition. C. It can accommodate 15 pieces of 18650 batteries, is equipped with an LED battery status indicator, and has no batteries inside. D. It is for battery repair and assembly, and is suitable for those with knowledge of battery performance and practical experience in battery assembly. E. Color: Black F. Material: Plastic G. Package contents: - 1 plastic housing (the color of the printed circuit board is random, and color specification requests are not entertained) H. Note: Self - assembly is required. I. Only the above package contents are included, and other items are not. J. Note: Light and different displays may cause slight differences between the color of the item and the actual product. The allowable measurement error is ±1 - 3 cm