O2totes Ultra LightWeight Backpack Fits The Inogen One G4/OxyGo Fit/Lightest Backpack for The Inogen One G4, under 10 ounces WILL ONLY FIT THE INOGEN ONE G4: IO-400, Purple, Fits: Inogen One G4

O2totes Ultra LightWeight Backpack Fits The Inogen One G4/OxyGo Fit/Lightest Backpack for The Inogen One G4, under 10 ounces

Inogen Extended (8-Cell) Battery - Replacement Battery - for The One G4 Rove 4-1.1 lb. - 5.91 x 2.68 x 1.34 in.

UpBright Car 12V DC Adapter Compatible with Inogen One G3 G4 G5 DC Power Cord Model BA-306 BA-301 BA306 BA301 12 Volt Auto Vehicle Boat RV Camper Cigarette Lighter Plug Power Supply Battery Charger