Converts for Ryobi 40V lithium batteries to for Dewalt 20V max lithium battery, allowing compatibility with various cordless power tools. Superior compatibility with multiple Ryobi 40V battery models, enabling use with for Dewalt 20V cordless drills, impact drivers, and outdoor tools. Built-in voltage protection chip ensures safe operation, while the high-quality ABS plastic construction provides durability. Easy to install and remove, designed specifically for 20V tools, ensuring a secure fit and reliable performance. Note that this is an adapter, not a battery; it cannot be used for charging power tool batteries and should be removed before charging. The RYB40DW20 battery adapter is designed to enhance the versatility of your power tools by allowing the use of for Ryobi 40V lithium batteries with for Dewalt 20V cordless tools. This adapter is perfect for those who want to maximize their battery usage and enjoy longer working times, whether indoors or outdoors. With its robust construction and safety features, you can trust this adapter to perform reliably in various applications. Color: Black Material: ABS Package Contents: 1* Battery Adapter