This battery adapter converter is perfect for DeWalt 20V MAX users who want to convert their power tools to work with Dyson V6 Series. It is compatible with 4Ah or above 4Ah lithium-ion batteries, and features automatic and click lock functions for easy use. The adapter is designed for the DW20V6 model, and is not suitable for V7, V8, and other models. Its silver color adds a sleek touch to your toolkit. Please note that this item is not a charger, and can't charge batteries.