[Product Advantages]: This adapter allows 18V lithium batteries to be used with 12V lithium cordless power tools, providing extended run-time and helping you save money. Easy to use and compatible with existing 12V tools. [Compatible with 18V Batteries]: This MT18MT12 adapter is designed for 18V batteries, including models BL1860B, BL1860, BL1850B, BL1850, BL1840, BL1830B, BL1830, BL1820, BL1815. It enables use with 12V lithium-ion battery tools such as BL1021B (BL1016), BL1020B, BL1041B, BL1040B, BL1040, BL1015, 197402-0, 197390, and CXT 12V cordless tools. [Use with 12V Power Tools]: Compatible with a wide range of 12V lithium-ion power tools including CXT models DF031D, DF331, DF0331D, TD110D, JR103D, JR105D, HSS01D, HP332D, DC10SB, DS032, HP330, HP331, HP331DSMJ, HP332, TD110, DF331DSMJ, and many others. Suitable for various 12V tools such as screwdrivers, clamps, impact drivers, drills, grinders, circular saws, LED lights, ratchets, radios, inflators, jigsaws, and heated jackets. [Safe Protection]: Features a solid design with high-quality ABS material. Resistant to high temperatures, wear, and drops. Compact and easy to carry. [Attention]: This adapter cannot be used to charge batteries. Do not plug the adapter into any charger. To charge the battery, always use the original battery charger. Color: Black Material: ABS Package Contents: 1 x Adapter (battery not included) Note: Light reflection and differences in display screens may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3 cm.