[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 also be used as a replacement for 12-volt Lithium-ion batteries such as BL1021B, BL1016, BL1020B, BL1041B, BL1040B, BL1040, BL1015, 197402-0, 197390, CXT, and fits 12-volt cordless tools. Battery not included. [Safe Protection] Solid design with high-quality plastic material. Resistant to high temperatures, wear, and drops. Portable and easy to use. This product is a converter only, designed for flexible conversion between one tool and another lithium battery. It is not a charger, battery, or machine, and cannot recharge batteries. Due to different production batches, labeling may vary and is random. This does not affect functionality or performance. 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 different manufacturing batches, but these do not affect usability. Color: Black Material: Plastic Package Contents: 1 x Battery Adapter Adapter only – tool and battery not included. Only the items listed are included; other accessories are not part of this package. Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement error allowance is +/- 1-3 cm.