Refurbished Inogen One G4 Portable Oxygen Concentrator – Ultra‑Light

Stay mobile with one of Inogen’s lightest portable concentrators at a lower cost with this refurbished Inogen One G4 portable oxygen concentrator. Weighing about 2.8 lb with a single battery, the G4 is built for shoppers who want a very small, easy-to-carry device for daily errands, appointments, and travel. The Inogen One G4 is a pulse-dose portable oxygen concentrator with three settings (1–3), delivering oxygen in pulses when it detects inhalation. It is meant for users whose prescriptions allow pulse-dose therapy rather than continuous flow, so your clinician should confirm that a portable pulse-dose device is appropriate—especially for sleep or higher oxygen needs. This unit is pre-owned and professionally reconditioned. It has been tested, inspected, cleaned, and sanitized for safe, reliable use; as a refurbished concentrator, it may show normal cosmetic wear, but the focus is dependable performance and battery function. Battery runtime on this refurbished G4 will depend on your setting, breathing rate, altitude, and especially battery age. Many users add a spare or newer battery—or use DC power in the car—if they need more predictable runtime for longer days. The Inogen One G4 is FAA-approved for in-flight use, making it a popular choice for flights and trips as long as airline battery and paperwork rules are followed. Always confirm your airline’s current requirements and bring enough charged batteries (often 150% of flight time plus ground time) before traveling.