Inogen One G4 4 Cell Battery

I’m sorry to say that right now we have a shortage of batteries and cannot provide any battery sales to our customers. We are not aware of when we will have stock either.     Inogen One G4 Lithium-Ion Battery* Up to 2.7 hours run time Item #BA-400. The Inogen One G4 Single Battery powers your Inogen One G4 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 town or the country. Stay active for a longer period of time with your Inogen One! An extra single battery will give you up to 2.7 hours of battery life.*   Specifications:Rechargeable Lithium-Ion Battery for Inogen One G4 ModelBattery Duration: Up to 2.7 hours* *Battery time varies with flow setting   No return will replace the Defective battery