Amazon.com: URUN V6 Battery Adapter for Ryobi 18V Lithium ion Battery Converter to for Dyson V6 Battery Replacement, Work for Dyson V6 Series Vacuum Cleaners : Tools & Home Improvement
Badaptor Milwaukee Battery Adapter to Ryobi 18v One+ Works with Ryobi – Knottec Wood Repair Glue
Dual 18v battery adapter for 40v Ryobi tools from JPElectron.com on Tindie
DM18RL Converter USB For Dewalt Battery Adapter Milwaukee 20V/18V To Ryobi 18V | eBay
When you need one 18v tool from a different brand. [Ozito/Einhell to Ryobi One+ battery adapter] : r/functionalprint