Parts List:1Lithium Battery AdapterHighlight [Wide Compatibility] The lithium battery adapter is compatible with 18V 20V Max Li-ion Battery BL1830 BL1840 BL1850 BL1860 BL1820 BL1815 BL1820B BL1830B BL1850B. Please make sure the model before purchasing. [Professional Battery Adapter] This lithium battery adapter allows the use of 20 volt batteries in 18-volt power tools. It makes you enjoy the benefits of extended Li-ion battery run time on your existing 18-volt power tools.[Note] This tool cannot be used for charging power tool battery. It does not fit any charger. If you need to charge your power tool battery, please use the original battery charger.[Good Material] This product is made of premium ABS and PC material, which is lightweight and easy to carry. The compact size is convenient to use.[After-sales] If you have any questions, please get in touch with us, our service team will provide you with a professional and satisfactory service.Detailed Product Name: MT20ML Lithium Battery AdapterMaterial: ABS+PCColor: BlackSize: 1107045 (mm)