The Inogen One G4 External Battery Charger will charge your Inogen One G4 single (4 cell) and double (8 cell) batteries.
If you are active and need to recharge multiple Inogen One G4 batteries simultaneously, or want to charge your battery faster than charging while using the unit, this extra charger will help you keep your extra batteries charged and ready for use.
The External Battery Charger will charge a completely depleted single (4 cell) battery in about 3 hours and will charge a completely depleted double (8 cell) battery in about 5 hours.
Inogen One G3 Double (16 Cell) Battery
Inogen One G3 External Battery Charger with Power Supply
Inogen One G3 Single (8 Cell) Battery
Inogen One G4 4 Cell (Single) Battery
Inogen One G4 8 Cell (Double) Battery