Converts for 40V lithium batteries to for 18V cordless power tools, maximizing battery utilization for extended use. Superior compatibility with 40V batteries, allowing seamless integration with for 18V tools like drills, impact drivers, and outdoor equipment. Built-in voltage protection chip ensures safe operation, while the high-quality ABS plastic construction provides durability and reliability. Easy to install and remove, designed specifically for for 18V tools, ensuring a secure fit and efficient performance. Note that this is an adapter, not a battery; it cannot be used for charging and should be removed before charging the battery. The RYB40MIL18 battery adapter is an innovative solution for users looking to enhance their cordless power tool experience. By converting for 40V lithium batteries to be compatible with for 18V tools, this adapter allows for greater flexibility and convenience in both indoor and outdoor tasks. With its robust design and safety features, users can confidently rely on this adapter for their power tool needs. Color: Black Material: ABS Package Contents: 1* Battery Adapter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.