Amazon.com: TPDL for Dyson V7 Battery Adapter, for Dewalt 20V Battery Convert to Dyson 21.6V V7 Handheld Vacuum Converter Absolute, Motorhead Pro, Trigger, Fluffy HEPA Li-ion SV11 Battery(Only Fit for V7 Series) :
JESTOP V8 Battery Adapter for Dewalt 20V Lithium Battery Converted to Replace for Dyson V8 Battery, Works with Dyson V8 Series Animal Absolute Vacuum Cleaner (DW20V8 Adapter ONLY) - Walmart.com
Dewalt Orbital Sander to Vacuum Adapter by Wynn G | Download free STL model | Printables.com