BL1850B/BL1840B Lithium Battery Charging Protections Plate Protective Circuit Board with for 18V Tool Features: OOTDTY Replacement BL1850B/BL1840B battery protections board. Suitable for BL18V tool lithium battery housing DIY. Craft from quality materials, reliable and easy installation. Accurate design, perfectly fit. Only the protective board and do not include batteries or casing materials. Specifications: Material: Printed Circuit Board Applicable Model: for 18V Tool BL1850B/BL1840B Lithium Battery DIY Package Includes: 1x Protective Board Note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution. _x000D_ _x000D_ _x000D_