For Ryobi 18V Li-Ion Battery Adapter DIY Dual USB LED-Switch Control 12V DC Port | eBay
Cordless USB Charger | Portable USB Charger | RYOBI 18V ONE+™ R18USB-0
18V ONE+ 150-WATT BATTERY POWER SOURCE AND... - RYOBI Tools
LabTEC P117 Dual Port Battery Charger Replacement for Ryobi 12V-18V One Plus Series, Li-Ion NI-Cd NI-MH Battery Charger for Ryobi BPL-1815 P102 P103 P104 P105 P106 P107 P108 P109 P122: Amazon.co.uk: DIY
Fast Charger For Ryobi ONE+ Plus P108 Li-ion Battery P117 P107 P104 12V/18V USB | eBay
Maybe 2nd best $20 new accessory?? Turns any 18v ryobi battery into a usb power bank. This guys isn't getting any love but I think it's pretty neat too. : r/ryobi