[Compatible with 18V Batteries] This MT18 MT12 adapter is compatible with 18V batteries, including BL1860B, BL1860, BL1850B, BL1850, BL1840, BL1830B, BL1830, BL1820, BL1815. It replaces 12-volt Lithium-ion batteries such as BL1021B (BL1016), BL1020B, BL1041B, BL1040B, BL1040, BL1015, 197402-0, 197390, and CXT for use with 12-volt cordless tools. Battery not included. [Safe Protection] Solid design with plastic material offers high temperature resistance, wear resistance, and drop resistance. Compact and easy to carry, simple to use. This product is a converter only, designed for flexible use 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 are not accepted, but this does not affect functionality. Note: Installation guide not included. Professional installation is strongly recommended. Please verify compatibility before purchase. Tips: Product design may be updated periodically. Slight variations in appearance or color due to batch differences may occur, but these do not affect performance. Color: Black Material: Plastic Package Contents: 1 x Battery Adapter (adapter only; tool and battery not included) Only the items listed above are included. Note: Lighting reflections and display settings may cause slight color differences between the image and the actual item. Measurement error allowance is +/- 1-3 cm.