GRW40MIL18 battery adapter converts Greenworks 40V lithium batteries for use with Milwaukee 18V cordless power tools. Enables extended runtime and greater convenience for indoor and outdoor applications. Superior Compatibility: Compatible with Greenworks 40V G-MAX batteries including models 29472, 29462, 29252, 20202, 22262, 25312, 25322, 20642, 22272, 27062, and others. Works with Milwaukee 18V cordless drills, impact drivers, brushless tools, chain saws, lights, blowers, and other compatible outdoor tools. Safe & Reliable: Built-in voltage protection circuitry. Constructed from high-quality ABS plastic for durability and safety. Easy to Install: Designed for seamless compatibility with Milwaukee 18V tools. Simple to attach and remove; fits securely and performs reliably. Adapter Only — Not a Battery: This is a mechanical adapter only. It does not function as a battery and cannot be used for charging. Do not attempt to insert the adapter into any battery charger. Remove the adapter before charging the battery. Color: Black Material: ABS Package Contents: 1 x Battery Adapter Note: Color appearance may vary slightly due to lighting conditions and screen settings. Measurement tolerance: ±1–3 cm.