Make a USB-C charger powered by an 18v RYOBI battery : r/ryobi
DIY Battery Adapter For Ryobi One+ 18V Li-ion Battery P743 Dual USB LED Light C# | eBay
RYOBI ONE+ 18V Lithium-Ion Portable Power Source P743 - The Home Depot
DIY Power Wheels Battery Adapter Connector 14 AWG Wires For Ryobi 18V Output – ASA College: Florida
Battery Adapter for Milwaukee Battery Adapter For Ryobi 18v Tool w/USB Port US | eBay
Ryobi ONE+ USB POWER ADAPTER R18USB-0 18V 2-Outlets With 1x1A & 1x2.1A Speed | eBay
Amazon.com: DM18RL Battery Adapter for Dewalt to Ryobi Battery Adapter, Convert Dewalt 20V Llithium Battery to Ryobi 18V P107 P108 Battery with 5V 2.1A MAX USB Charge : Tools & Home Improvement
Porter Cable Battery Adapter to Ryobi – Power Tools Adapters