Ridgid AC840094 Gen5X Dual Port 18V Lithium Ion and NiCad Battery Charger with Pass-Through AC Ports and USB Charging (Batteries Not Included, Charger Only) - Amazon.com
RIDGID 18V Cordless 175-Watt Power Inverter (Tool Only) AC86097 - The Home Depot
RIDGID 18V USB Portable Power Source with Activate Button Kit with (2) 18V 4.0 Ah Lithium-Ion Batteries AC86072B-AC87004P - The Home Depot