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Inogen One G4 Portable Oxygen Concentrator with DOUBLE BATTERY

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  • Inogen One G4 Portable Oxygen Concentrator for Sale
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  • 8-Cell Double Battery for use with the INogen Oe G4 Portable Oxygen Concentrator
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 Product Description

Inogen One G4 Portable Oxygen Concentrator | 8-Cell Double Battery

Inogen One G4 System - IS-400-NA8

Looking for the smallest portable oxygen concentrator? Meet the Inogen One G4 Portable Oxygen System.

Inogen One G4 8- Cell portable oxygen concentrator is the smallest, lightest weight, and one of the quietest portable oxygen machines available to oxygen users today. 


With the Inogen One G4 system you can still do your chores around the house, get around town, take a weekend trip to visit friends and family, or even fly to your favorite vacation spot!

The G4 portable oxygen machine is your single solution for oxygen 24/7 whether you are at home or away.

The G4 with the 8-Cell Double Battery weighs a mere 3.29 pounds or 3.41 pounds with the shoulder strap and provides pulse oxygen from 1 to 3 settings. The G4 is available in a package with either the 8-cell extended battery, the 4-cell battery, or you can mix & match battery sizes to suit your lifestyle. Much like your cell phone, the G4 comes with both an AC wall adapter and a DC vehicle adapter which means you can plug the G4 system into a power source anywhere, anytime. While plugged in, the G4 will recharge the battery, even in your vehicle, making it simple to manage your batteries. On a full charge, the 8-cell Double battery will last up to 4.5 hours at a setting of 2. We offer discounted battery packages if having an extra battery is important to you.  

Additional Battery Configurations Available! Please call 1-800-958-0192 and we can help customize a G4 package that will work best for you!

The Inogen One G4 portable concentrator is FAA Approved for use on board all major aircraft and is indicated on the label affixed to the device.


  • Setting 1 - Up to 6 Hours
  • Setting 2 - Up to 4.7 Hours 
  • Setting 3 - Up to 3 Hours



Inogen One G4 with 8-cell Double Battery Specifications:

  • Weight - 3.29 lbs
  • Dimensions - 7.79” H x 2.68” W x 5.91” L
  • Flow - Pulse 1-3
  • Power - 100-240 VAC, 50/60 Hz; 11-16 VDC
  • Warranty - 3 Years Device; 1 Year Columns/Accessories

             *Lifetime Warranty Upgrade Optional - Call For Details!*

Inogen One G4 Portable Oxygen Concentrator Frequently Asked Questions

Q. Are you an Authorized Inogen One G4 Dealer?  
A. Yes, we are a Fully Authorized Inogen Discount Dealer and we are named directly on the Inogen website.

Q. How small is the Inogen One G4 portable oxygen concentrator with the 8-Cell Double Battery?   A. The G4 oxygen machine weighs only 3.29 pounds with the 8-Cell double battery and stands just 7.79” H x 2.68” W x 5.91” L. The G4 device is designed to be worn over your shoulder, around your waist or as a backpack (optional).  Call for Details!

Q. How much oxygen can the G4 oxygen concentrator produce?
A.The Inogen One G4 offers pulse only settings of 1,2 or 3.  

Q. What is the oxygen concentration of the Inogen One G4?  
A. the oxygen concentration of the G4 oxygen generator is 90% +/- 3% on all settings. The G4 is equipped with a "Low O2" internal Oxygen Sensor and will alarm should the O2 concentration go below therapeutic range.

Q. Does the Inogen One G4 have an internal battery?  
A. The Inogen One G4 POC does NOT have an internal battery. The unit runs off of an external battery cartridge which is easily inserted and disconnected with simple push button operation. Swapping out batteries is quick and simple. 

Q. Can the Inogen One G4 battery cartridge be powered and charged in my vehicle?  
A. When connected to your vehicle's DC "cigarette lighter" charging port, your vehicle can power your G4 unit and recharge the battery no matter the battery size. The battery will need to be connected to the unit in order for it to charge. To charge the G4 oxygen concentrator batteries without being connected to the unit, you will be in need of the optional G4 external battery charger.

Q. Is the Inogen One G4 portable oxygen concentrator allowed on an airplane?  
A. Yes. The Inogen G4 oxygen machine is FAA approved. Note: Prior To Traveling by Plane: Check with your airline a few weeks in advance regarding their policies for use of Portable Oxygen Concentrators.

Q. Can I use the Inogen One G4 while resting or sleeping?
  A. The G4 portable oxygen system offers a technology Inogen calls Intelligent Delivery. This smart technology is intuitive and flexible to your changing environments. As your breathing rate slows down, the G4's Intelligent Delivery Technology will increase the size of the oxygen bolus dose. During periods of sleep, the unit has a more sensitive breath detection trigger. This is important in order to detect a more shallow breath. This allows most oxygen users to sleep with the Inogen One G4. The G4 is not recommended for use with a CPAP or BiPAP machine. 

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 Product Reviews

Showing reviews 1-10 of 14 | Next

  1. Excellent Concentrator, Charging components could use improvement.

    Posted by William Kroschel on 30th May 2019

    I praise Inogen for developing a product that makes the life of oxygen dependent people easier. I love the freedom and ease of traveling, especially air travel.
    What could use improvement are the charging components, which are very bulky and hard to transport. The cables and AC/DC adapters need to be more like cell phone components.Also it is difficult when installing and removing the G4 from the carrying case and hip bag.

  2. Free At last

    Posted by Unknown on 2nd Apr 2019

    I got a great deal and even better service. The staff here is wonderful and the most knowledgeable you will find.

  3. Great product

    Posted by Vince B on 28th Dec 2018

    Performs as advertised.quiet and light-weight.
    Car charger great feature.
    Totally satisfied.


    Posted by Charlotte Webster on 21st May 2018

    This INOGEN ONE G4. Has made my life so much easier. I am able to get out without any trouble now. I would recommend this product to any one that is on O2 all the time.
    THANK YOU!!!
    Charlotte Webster

  5. Incredible Product and Service

    Posted by Jennifer and Ann in Tennessee on 27th Mar 2018

    My Mom got put on oxygen when she was discharged from the hospital in January. Prior to that she had not had any health issues... needless to say this was a difficult adjustment for all of us. The home health provider sent over a huge concentrator tank and supplemental tanks for her to take when she left the house. Even the smallest tank was too heavy for her to carry (she weighed about 85 pounds at the time). That's when we discovered the Inogen at Portable Oxygen Solutions. The unit, even with the larger 8 cell battery is easily manageable for her!!!! The staff were beyond helpful when we called them to discuss the unit over several calls. Once we purchased the Inogen that incredible customer service continued over several calls getting a feel for the equipment. I did my homework before purchasing too... Portable Oxygen Solutions had the best price and even had they been a bit more expensive the customer service would have been worth it. Thanks guys!!! You are the best!!!

  6. Compact O2 unit for on the go folks

    Posted by Gery on 26th Mar 2018

    Great compact O2 unit

  7. Works great

    Posted by Sue H. on 19th Mar 2018

    It works very good for me I. I would highly recommend this product, nice people people to deal with.

  8. InogenOne G4 is a Must for home oxygen therapy

    Posted by Unknown on 5th Mar 2018

    Outstanding company to do business with, and Jeff, an honest salesman, convinced me it was unnecessary to spend an additional $300 for a backup battery.

  9. Super Product

    Posted by Rick on 10th Feb 2018

    The unit has been working great. My wife uses it all day as her primary source of O2. She likes if so much better than fighting the hoses all day. The service was great - shipped the same day ordered and the price was great. Jeff answered all our questions, was not pushey and seemed to want us to make best decisions for us even when it ment less money for him.

    Thanks Jeff

  10. It does everything Jeff said it would

    Posted by Joan Krockenberger on 28th Jan 2018

    It is almost unbelievable what this small concentrator can do It is strong enough for home night time use and small enought to always have with you

Showing reviews 1-10 of 14 | Next


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