General description Plastic Case Nesting Cell Protection Detection Board PCB designed for 18V BL1840, BL1850, and BL1830 batteries. This product allows you to build a DIY battery capacity for your machine, featuring high compatibility with various devices. It aids in the repair and assembly of battery packs, ensuring professional quality and performance. Technical specifications Compatible with: BL1815, BL1830, BL1840, BL1850, BL1860, LXT400 Battery cell type: 10Pcs INR18650 Material: Plastic Color: Black Measurement error: +/- 1-3cm Usage Built-in memory chip and CPU for automatic battery charging effect LED indicator to monitor remaining power Latest upgrade circuit board with single cell balance detection function to prevent over-charge and over-discharge Other information Package Contents: 2 sets of BL1830 battery cases Note: Light and different displays may cause the color of the item in the picture to differ slightly from the actual product Safeguard features against incorrect