General description Plastic Case Charging Protection Circuit Board PCB designed for Makita 18V batteries (BL1840, BL1850, BL1830, BL1860B, LXT 400). This high-quality product allows you to DIY the battery capacity of your machine and is compatible with older devices. It helps in repairing and assembling battery packs while providing multiple protection features. Technical specifications Compatible Battery Codes: BL1830, BL1840, BL1850, BL1860, LXT400 Battery Cell Type: 10Pcs INR18650 Color: Black Material: Plastic Measurement Error: +/- 1-3 cm Compatibility and accessories Suitable for 18V Li-ion Cordless Power Tools Package Contents: 2 x Battery Case Set (some accessories are random) Other information Features an LED indicator Note: Light shooting and different displays may cause the color of the item in the picture to differ slightly from the actual product.