[Compatible With 18V Batteries] This MT18 MT12 adapter is compatible with 18V batteries, including BL1860B, BL1860, BL1850B, BL1850, BL1840, BL1830B, BL1830, BL1820, BL1815. It can be used as a replacement for 12-volt Lithium-ion batteries such as BL1021B, BL1016, BL1020B, BL1041B, BL1040B, BL1040, BL1015, 197402-0, 197390, CXT, to fit 12-volt cordless tools. Battery not included. [Safe Protection] Solid design with high-quality plastic material. Resistant to high temperature, wear, and impact. Portable and easy to use. This product is a converter only, designed solely for compatibility between tools and lithium batteries. It is not a charger, battery, or power tool, and cannot recharge batteries. Due to different production batches, labeling may vary randomly. Designation requests cannot be accepted, but this does not affect functionality. Note: Installation guide not included. Professional installation is recommended. Please verify compatibility before purchase. Tips: Product design may be updated periodically. Slight variations in appearance or color may occur due to batch differences, which do not affect performance. Color: Black Material: Plastic Package Contents: 1 x Battery Adapter Adapter only – tool and battery not included Contents limited to items listed above; other products are not included. Note: Lighting and display settings may cause slight color differences between image and actual item. Measurement tolerance: +/- 1-3 cm.