Used Inogen One G4 Portable Oxygen Concentrator – Ultra‑Light Pulse Dose

Stay mobile with one of Inogen’s lightest portable concentrators at a lower cost with this used 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 used concentrator, it may show normal cosmetic wear, but the focus is dependable performance and battery function. Why choose a used Inogen One G4 Ultra‑lightweight option in the Inogen family at about 2.8 lb with the single battery. Ideal for people who prioritize small size and short outings more than maximum flow range. Lets you own an Inogen‑brand POC at a lower price than a new system while keeping recognized quality. Key specs at a glance Delivery mode: Pulse‑dose oxygen, settings 1–3 Weight (single battery): about 2.8 lb Size (single battery): approx. 5.91 in L × 2.68 in W × 7.2 in H Noise level: about 40 dBA at setting 2 for quiet operation. Battery life when new: up to 2.7 hours with the single battery and about 5 hours with the double battery on setting 1. Power: AC (100–240V, 50–60 Hz) and DC vehicle power for home and travel use. Battery and travel expectations Battery runtime on this used 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.