The Inogen G4 Portable Oxygen Concentrator is one of the smallest and lightest portable oxygen concentrators ever sold with a setting capability of 1-3. The battery options for this unit make it extremely flexible to meet your lifestyle.

This Battery charger will allow you to charge either the single or double battery while outside of the Inogen G4 unit itself. This allows you to use the unit while charging an additional battery at the same time. This can be very convenient when you know that you will be without power for longer periods of time or have shorter time periods to recharge between outings.