How much does the Inogen G4 weigh?

The >a href="https://www.oxygenconcentratorstore.com/inogen-one-g4/">Inogen One G4 weighs only 2.8 pounds, making it the smallest portable oxygen concentrator (POC) offered by Inogen. The double battery adds about half a pound to the weight, making it 3.3 pounds.

Unit Only: 1.8 pounds
Unit with Small Battery: 2.8 pounds
Unit with Large Battery: 3.3 pounds