Slightly Used Inogen One G3 Portable Oxygen Concentrator

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Inogen One G3 portable oxygen concentrator is among the leading products in the oxygen supply industry today. It has incredible features that were proven and tested by many users, making it a very reliable portable oxygen concentrator.

This Package Includes

  • Slightly Used Inogen One G3
  • Single Battery (Double Battery Optional)
  • User Manual 
  • AC Power Supply
  • DC Power Supply
  • Carry Bag

The primary purpose of portable oxygen concentrators is to supply oxygen on the go, and this device does just that and more. Despite its small size at only 2.19 kg, it already has a five pulse dose setting. It is not heavy, so it is perfect for carrying around and bringing anywhere. The Inogen One G3 has several accessories to make it more accessible and convenient.

Another thing that people love about this unit is its two battery options available. The single battery option can last up to a minimum of 4.7 hours, while the double battery option lasts around 10 hours. It comes with a DC power supply charger, so you charge it on the road with your car. 

It is perfect for traveling, either for business or vacation, because it is FAA approved. Just imagine the things you can enjoy again with the excellent Inogen One G3 portable oxygen concentrator specifications!

Curious? You would want to continue reading to learn more about this fantastic product.

Inogen One G3 Components

  • Column pair (sieve beds)
  • Particle filters
  • Lithium ion batteries
    • Double battery pack (8-cell)
    • Single battery pack (16-cell)
  • DC power cable
  • AC power cable
  • AC power supply
  • User manual
  • Cannula
  • Shoulder strap
  • Carry bag

Features & Benefits

  • Pulse flow setting: 1 to 5
  • mL dose: 18.9 mL
  • Type: Portable (Battery-powered)
  • Oxygen purity: 90% to 95%
  • Noise level: 39 dB
  • US FDA Approved: Yes
  • Lightweight (4.8 lbs)
  • Compact (8.75H x 8.25W x 3Dinch)
  • FAA approved
  • Durable
  • Easy to read LCD screen display and controls
  • Lithium-ion batteries
  • Long battery life

Inogen One G3 Size

  • Width: 8.25 inches
  • Height: 8.75 inches
  • Depth: 3 inches
  • Dimension: 8.75H x 8.25W x 3Dinch
  • Concentrator Weight: 2.19kg/4.8lbs
  • Carry Bag Weight: 2 lbs
  • Battery Weight: Double Battery (16-cell) – 2.49 lbs; Single Battery (8-cell) – 1.65 lbs


  • Maximum Pulse Flow Minute Volume: 1050 ml per minute at the flow rate of 5
  • Oxygen Concentration: 90% to 95%
  • Maximum Outlet Pressure: 25 psi
  • Inspiratory Trigger Sensitivity: 0.14 cm H2O
  • Pulse Flow Settings: 1 to 5 Pulse Dose

Operating Conditions

  • Noise Level: 39 decibels
  • AC Input: 100-240 VAC, 50-60 Hz
  • AC Output: 19 VDC, up to 90 Watts
  • DC Input: 12-5-15-5 VDC, 10A Max.
  • DC Output: 12.0 to 16.8 VDC
  • Battery: Single battery (8-cell battery); Double battery (16-cell battery)
  • Battery Duration: 4.7 on single battery; 8 to 10 hours on double battery
  • Battery Recharge Time: 3 hours – single battery; 6 hours – double battery
  • Humidity: 0% to 95%, non-condensing
  • FAA Approved: Yes
  • Altitude: 10,000

Inogen One G3 Accessories

External Battery Charger

The G3 has an optional external battery charger that allows you to charge additional batteries when they aren't connected to your portable oxygen concentrator. The external battery charger takes approximately 3 hours to charge a single battery and approximately 6 hours to charge the double battery. 

Inogen One G3 Backpack

The backpack allows you to easily slide the unit into the backpack. While the unit is inside of the backpack, you can still use the device and you can also access the settings to adjust your flow, turn the device on, turn the device off, and all of the other features that you'll need. The backpack for the G3 has two shoulder straps, a carrying case, and a waist belt if you would like to buckle the unit around your stomach. 

Double Battery

This accessory allows you to double your battery life on the G3 Concentrator. You can always purchase a new battery (or double battery) in the future if you find that you're having to charge your Inogen One G3 too often, though most of our customers are happy with the standard double battery. Extra batteries do come in handy when traveling or leaving the house for extended periods of time. 

Inogen One G3 Carry Bag

Inogen One G3 Specifications Table




4.8 lbs/2.19 kg


8.75H x 8.25W x 3Dinch

Oxygen Concentration

90% to 95%

Flow Settings

1-5 pulse dose

Sound Level

39 dB


AC Power: Yes

DC Power: Yes

Battery Duration

4.7 hours (Single battery); 10 hours (external battery)

Charge Time

5 hours

Operating Conditions

Temperature: 41-104 degrees Fahrenheit (5-40 degrees Celsius)

Humidity: 0% to 95%, non-condensing

Altitude: 10,000 feet


  • Inogen One G3
  • Single Battery (Double Battery Optional)
  • User Manual 
  • AC Power Supply
  • DC Power Supply
  • Carry Bag


3 years


Buy Inogen One G3 At Sprylyfe

We have the best portable oxygen concentrators today at Sprylyfe, including the Inogen One G3. We also offer most of our products with discounts you cannot access anywhere. You can find the Inogen One G3 portable oxygen concentrator at the best price here at Sprylyfe.

You can call us at (855) 205-5010 about our promo packages to save more on your next purchase. You can contact us and ask for help from our product specialist to find the portable oxygen concentrator that would work best for you.

When you order from us, you can take advantage of the free shipping and flexible payment plans we prepared to make the experience extra convenient. We also have a money-back guarantee if you receive your order with a defect and other valid reasons for a refund.

Currently, the Inogen One G3 portable oxygen concentrator price is $2,995. Have a smooth and fast transaction here at Sprylyfe with our responsive and friendly customer support.

Why Choose the Inogen One G3 Oxygen Concentrator? 

The G3 is packed full of luxurious features that allow you to experience the supplemental oxygen 24/7 without having to lug around heavy & difficult to use oxygen cans. 

The Inogen Oxygen Concentrator weighs just 4.8 pounds and there are accessories such as the portable backpack that allow you to easily carry this portable oxygen concentrator. Not only is this unit extremely light, but this device is also extremely small at only 8.25*8.75*3.0 inches. 

The G3 has two different battery options. The single battery will last up to 4.7 hours while the double battery will last you up to 10 hours. The exact battery life will ultimately depend on what settings you're using. One great thing about this unit is that it comes with a DC power supply, so you can simply charge this unit while you're traveling in your car. 

If you're traveling on vacation and will be flying, you can rest assured since the Inogen One G3 is FAA approved for airline travel within the United States. 

Using the Inogen One G3 is extremely easy and user-friendly. There is a large LCD screen that displays your current flow setting and battery life. To adjust the flow setting, you simply press the +/- button and your new flow setting will be reflected on the screen. 

Another huge benefit of this device is how quiet it is. This unit operates at only 39 decibels, so you can easily bring it with you to the library, church, or dinner without having to worry about the noise level your machine is putting off. 

One of our favorite features of the Inogen One G3 is the intelligent pulse dose delivery technology. Intelligent pulse dose delivery technology makes sure that oxygen therapy is always delivered efficiently.

If a patient is breathing out of their mouth and no breath is detected by the Inogen One G3, an audible alert will sound and let the patient know that their breath isn't currently being detected. This safety feature offers a fantastic boost in the overall efficiency of this device. 

The oxygen flow settings on this portable oxygen concentrator range from 1-5. 

Inogen One G3 Frequently Asked Questions

Can I drive with an Inogen One G3 portable oxygen concentrator?

Yes. You can safely drive while using the Inogen One G3. Its compact size would not disrupt your driving nor divert your attention from the road.

It is much safer than driving with oxygen tanks. It also has a DC power cord to power it up with your car. However, each state has specific regulations regarding this.

Read this comprehensive guide on driving with a portable oxygen concentrator to learn more.

Can I sleep with an Inogen One G3 portable oxygen concentrator?

Portable oxygen concentrators are great for oxygen therapy and sleep apnea, so using the Inogen One G3 while sleeping is okay. Portable oxygen concentrators can be used at any time of the day, even if you are doing something active or resting at night. You can also take advantage of the Inogen One G3 portable oxygen concentrator accessories at this point.

You check out this post on sleeping with a portable oxygen concentrator.

Can anyone use an Inogen One G3 portable oxygen concentrator?

Generally, anyone can use a portable oxygen concentrator. However, You should not use it without a prescription from a health care provider. Administering oxygen to yourself may do more harm than what you intend to. Doctors prescribe specific flow settings to their patients to cater to their oxygen needs. 

Can I buy an Inogen One G3 portable oxygen concentrator with no prescription?

Yes. You need a prescription to get the portable oxygen concentrator Inogen One G3 unit. This is due to the potential harm that using oxygen therapy without proper health provider guidance can do to you. Receiving too much oxygen can result in oxygen toxicity. It can also cause breathing problems, coughing, and even death.

If you are interested, you can read this post on buying a portable oxygen concentrator with no prescription

What are the benefits of using the Inogen One G3 portable oxygen concentrator?

There are many benefits to using the Inogen One G3 portable oxygen concentrator. This includes reducing symptoms of COPD, enhanced stamina, better sleep quality, and decreasing anxiety. It is also especially useful for people suffering from chronic breathing problems, asthma, recovering from COVID-19, and the elderly.

To know more about it, you should check this helpful blog about the benefits of portable oxygen concentrators.

How many watts does Inogen One G3 produce?

The Inogen One G3 portable oxygen concentrator system runs on 19 to 50 watts. This is the same as typical household appliances, including mini-fridges, fans, lights, and laptop charging. It runs mainly on a battery, so it would not take large amounts of energy from your electricity unless it's time for charging. 

How long does Inogen One G3 last?

If treated with love and care, the Inogen One G3 unit can last for as long as 4 to 5 years of constant usage. Some of its components are replaceable, so you can get a replacement if its parts malfunction. It comes with a 3-year warranty, and you can use that to ensure the good health of your portable oxygen concentrator. 

Do you sell a pre-owned and refurbished Inogen One G3 portable oxygen concentrator?

Yes. Here at Sprylyfe, we sell pre-owned and refurbished portable oxygen concentrators at a lower price. Our financing options go low at $48 a month. 

Currently, the pre-owned Inogen One G3 portable oxygen concentrator for sale at Sprylyfe has limited stocks, so be sure to contact us immediately. You can connect with us by calling 1-800-314-8225 today, and we will be happy to assist you. 

How does financing with Sprylyfe work?

Sprylyfe has a return and exchange policy to protect the customer's satisfaction with our services and products. This allows the customers to return damaged goods and exchange them within 30 days after purchase. 

Our products are checked before leaving the facility. However, accidents may happen during shipping that is beyond our control.

To know more, you can review our financing return and exchange policy here.

If you have any additional questions about the Inogen One G3, please give us a call at (800) 314-8225 or email us at