I am flying from Buffalo, NY to Baltomore, MD in March and am getting a bit nervous about using a portable concentrator. It is approved for use on the plane, but I am concerned about how much time it will actually provide. I am on a setting of 2, and will have an extra battery with the concentrator. My O2 provider says it will last "up to" 8 hours.
Has anyone out there used one, and how long did it really last?