Inogen One G3 Portable Oxygen Concentrator - 16-CELL DOUBLE BATTERY Who can use the Inogen G3 portable oxygen concentrator?  Users who require an oxygen device which can provide 1 to 5 Pulse settings of supplemental oxygen. G3 Double Battery...

The Inogen One G3 Single Battery powers your Inogen One G3 concentrator when you’re away from a power source to give you complete freedom and mobility. With an extra single battery, you can have a backup battery in place while traveling around...