Amazon.com: 1x Adapter for Ryobi 18V Cordless Tools Fits for RIDGID 18V Battery (Not Advanced 18V Battery)- Adapter Only : Tools & Home Improvement
For Ridgid 18V 20V Battery Adapter Convert to for Ryobi 18V Series Power Tool | eBay
DIY Adapter for Ryobi ONE Battery to Ridgid 18V Power Tool Interchange Batteries Between Brands Single Battery Does It Everythang3d - Etsy
DIY Adapter for Ryobi ONE Battery to Ridgid 18V Power Tool Interchange Batteries Between Brands Single Battery Does It Everythang3d - Etsy
Makita Battery Adapter to RIDGID – Power Tools Adapters
NTD: Badaptor Ridgid-to-Ryobi adapter didn't want to invest in yet another battery plat, and will save by buying less expensive tools where it makes sense : r/Tools
Badaptor – Ridgid To Ryobi 18V Battery Adapter – Badaptor