1. Can Built-in 10Pcs INR18650 Battery cells . 2. DIY The capacity for your Machine battery. High quality for professional use 3. High compatibility with old device and more . Help to repair and assemble batteries pack 4. Upgraded balance detection function safe and most 5. the latest circuit board, multiple protection. With LED indicator Type: Battery Storage Box Replacement Battery Codes: BL1830 BL1840 BL1860 BL1850 LXT400 . Suitable Power Tools Models: for 18V Li-ion Cordless Power colour:Black Material:plastic Package Contents: 1 x Battery shell casing set(Some accessories are random, you cannot choose designated accessories) Only the above package content, other products are not included. Note: Light 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.