Amazon.com: for Dyson V7 V8 Battery Adapter, Convert for Dewalt 20v Battery to Dyson V7/V8 Batteries, to Replace for Dyson V7&V8 Motorhead Series Cordless Stick Vacuum Cleaner Original Battery (Adapter Only) :
New To Alt Fit Tool Adapter Converter Kit For Dyson V6 V7 V10 SV10 SV11 Cordless Vacuum Cleaner - AliExpress