Compare concentrators

Compare portable oxygen concentrators

Weight, settings, battery life and noise for every portable we carry — side by side, plus head-to-head guides for the most common choices.

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Portable concentrators side by side

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Model	Delivery	Settings	Weight	Battery at setting 2	Noise
Inogen Rove 4	Pulse dose	1–4	2.9 lb (intermediate battery)	3 hr 34 min (intermediate) · 4 hr 40 min (extended)	39 dB
Inogen One G5	Pulse dose	1–6	4.7 lb (single battery)	5 hr (single) · 10 hr (double)	39 dB
Inogen Rove 6	Pulse dose	1–6	4.8 lb (standard battery)	5 hr (standard) · 10 hr 15 min (extended)	37 dB
CAIRE Freestyle Comfort	Pulse dose	1–5	5 lb (8-cell battery)	4 hr (8-cell) · 8 hr (16-cell)	About 39 dB
Oxlife Liberty2	Pulse + continuous	Pulse 1–10 · Continuous 0.5–2 LPM	8 lb with battery	Pulse 2: 4 hr · Continuous 2 LPM: 1 hr	—
GCE Zen-O	Pulse + continuous	Pulse 1–6 · Continuous 0.5–2 LPM	10.25 lb	Pulse 2: 4 hr (8 hr with 2 batteries) · Continuous 2 LPM: 45 min (1 hr 30 min with 2)	38 dB (pulse 2)
Oxlife Independence	Pulse + continuous	Pulse 0.5–6 · Continuous 0.5–3 LPM	16.7 lb	Pulse 2: 2 hr 53 min (5 hr 45 min with 2) · Continuous 2 LPM: 1 hr 15 min (2 hr 30 min with 2)	40 dB
CAIRE SeQual Eclipse 5	Pulse + continuous	Pulse 16–192 mL · Continuous 0.5–3 LPM	18.4 lb with battery	Pulse 2: up to 5.1 hr · Continuous 2 LPM: up to 2 hr	48 dB (3 LPM continuous)

Specs are manufacturer figures. Battery times are averages and vary with breathing rate, altitude and battery age. Scroll sideways on a phone to see every column.

Head-to-head comparisons

The matchups people ask us about most.

Inogen Rove 6 vs. Inogen One G5 →Day to day, these two Inogen portables are nearly identical — same six pulse settings, same 1,260 mL/min maximum output, and almost the same size and weight.

Inogen Rove 6 vs. CAIRE Freestyle Comfort →Both are lightweight, pulse-only portables in the 5 lb range.

Inogen Rove 4 vs. Inogen Rove 6 →Same family, different jobs.

Oxlife Liberty2 vs. GCE Zen-O →These are two of the lighter portables that also offer continuous flow up to 2 LPM — handy for sleep or for prescriptions that call for continuous oxygen.

GCE Zen-O vs. Oxlife Independence →Both offer pulse and continuous flow.

Oxlife Independence vs. CAIRE SeQual Eclipse 5 →The two go-to options for continuous flow up to 3 LPM in a portable.

Common questions

What’s the lightest portable oxygen concentrator?

Of the models we carry, the Inogen Rove 4 is the lightest at 2.9 lb with its intermediate battery. It’s pulse-only with four settings, so it fits lower prescriptions.

Do I need pulse dose or continuous flow?

Your prescription decides. Pulse dose delivers oxygen as you inhale and saves battery; continuous flow delivers a steady stream, which some people need for sleep or higher needs. See our continuous flow guide.

Which portable has the longest battery life?

At pulse setting 2, the Inogen Rove 6 with its extended battery runs about 10 hr 15 min. For continuous flow at 2 LPM, the CAIRE SeQual Eclipse 5 runs up to about 2 hours.

Are these all FAA approved?

Yes — every portable on this page is FAA approved for use on flights. See our flying with oxygen guide.