Slightly Used Inogen One G4 Portable Oxygen Concentrator

Slightly Used Inogen One G4 Portable Oxygen Concentrator


What’s Included:

✔︎ Slightly Used Inogen One G4 Portable Oxygen Concentrator
✔︎ Single Battery (Double Battery Available for Additional Cost)
✔︎ AC Power Supply
✔︎ DC Power Cord
✔︎ Shoulder Strap
✔︎ Carrying Case
✔︎ Air Inlet Filter
✔︎ 3 Year Warranty


✔︎ Single or Double Battery Options
✔︎ 1/2 the Size & 40% Lighter than the slightly used Inogen One G3
✔︎ Designed for Both Day and Night Time Use
✔︎ LCD Screen with Enlarged Buttons for Strain Free Operation
✔︎ Ultra-Quiet Operation
✔︎ Requires Minimal Maintenance

*Call 1-800-269-0726 to Talk to One of Our Respiratory Specialists*


Slightly Used Inogen One G4Running Errands with the Inogen One G4

Meet the FAA approved slightly used Inogen One G4 portable oxygen concentrator. Adding yet another unit to their already incredible line of oxygen concentrators.

This exceptionally lightweight supplemental oxygen machine is designed to drastically increase your freedom and independence 24 hours a day. In fact, the slightly used Inogen One G4 is approximately half the size of the slightly used Inogen One G3 and 40% lighter.

On top of being one of the smallest and lightest pulse flow 1-3 portable oxygen concentrators, it’s also one of the quietest concentrators available on the market.

Take back control of your respiratory disease with the lifestyle enhancing benefits of a slightly used Inogen One G4.

Pulse Flow Delivery That Satisfies Your Respiratory Needs 24/7

  • Pulse Flow Settings: 1-3

Inogen One G4 Carry Bag in UseWhether you are looking to upgrade your current medical oxygen device or shopping for your first device. If your supplemental oxygen prescription requires a pulse flow of 1-3, the slightly used Inogen One G4 was designed to satisfy your respiratory needs while exercising, walking up stairs, watching T.V., and for night time use.

That’s right, the slightly used Inogen One G4 is designed to deliver your prescribed dosing of medical grade supplemental oxygen both day and night. Which is attributed to the unit’s intelligent pulse oxygen delivery.

Intelligent pulse oxygen delivery ensures that the slightly used G4 monitors your breath rate and volume to deliver precise oxygen dosing.

Giving the concentrator the ability to sense even shallow breaths that are common at night while sleeping.

If you require the use of a CPAP or BiPAP machine in addition to oxygen therapy, the slightly used Inogen One G4 will not work for you.

Lightweight & Compact for Restriction Free Operation

Inogen One G4 Size Compared to an AppleKeep your mind at ease knowing you are receiving an adequate supply of oxygen at all times, without a bulky and cumbersome device holding you back from experiencing life to the fullest.

Weighing in at a mere 2.8 pounds and measuring 5.91″L x 2.68″ W x 7.2″ with the single battery installed, the slightly used Inogen One G4 was specifically designed for the independent and active oxygen patient. The compact and lightweight design will help to encourage you to follow your daily exercise regiment.

Due to the POC’s minimal weight, this is an ideal portable oxygen concentrator for both home and on the go use.

LCD Screen Control Panel Offers Confusion Free Operation

Inogen One G4 Portable Oxygen ConcentratorNothing is more frustrating than receiving a new piece of technology, only to realize there’s a steep learning curve you must go
through before actually using it.

With the slightly used Inogen One G4’s simple control functions and easy-to-read LCD display, you will be able to seamlessly use and operate the concentrator right out of the box.

The backlit LCD screen displays your selected flow setting, battery gauge, as well as a percentage of remaining battery life, in enlarged text for strain free reading.

While the on-board control panel features enlarged power and flow adjustment buttons, in addition to an audible alarm mute button to minimize disruptions.

But don’t worry, if you silence an alarm you will still be notified if an error occurs with an illuminated LED light on the control panel.

Multiple Battery Options to Satisfy Your Lifestyle Demands

  • Single Battery
  • Double Battery

Oxygen therapy certainly is not a one size fits all, so why should your battery life? The slightly used Inogen One G4 gives you the option to choose between the lightest overall package or a slightly heavier package in exchange for double the portable operation.

If you want the lightest available slightly used Inogen One G4 package, the single battery is ideal for you. Offering up to 2 hours and 15 minutes of portable operation on a single charge using setting 2, all while weighing 2.8 pounds.

On the other hand, if you don’t mind incrementally increasing the weight of the slightly used G4 to 3.3 pounds in exchange for twice the battery life. The double battery will surely exceed your expectations with up to 4.5 hours of portable use on a pulse flow setting of 2.

When it comes time to swap out a depleted battery for a fully charged one, simply press the “eject” button and the battery will release from the base of the unit.

Full Battery Specifications:

Pulse Flow Rate Single Battery Double Battery
1 Up to 2 Hours and 40 Minutes Up to 5 Hours
2 Up to 2 Hours and 15 Minutes Up to 4 Hours and 30 Minutes
3 Up to 1 Hour and 20 Minutes Up to 2 Hours and 30 Minutes

Restriction Free Charging Options

  • AC Power Supply
  • DC Power Cord
  • External Battery Charger

When it comes time to recharge either the single or double battery, you have the ability to charge it 3 different ways so you can charge wherever you go.

Charge at home or in the hotel room through a standard wall outlet using the AC power supply, in your car, truck, SUV, R.V., or boat through the cigarette lighter outlet with the DC power cord. The best part is, both the AC and DC power supplies allow full operation of all 3 settings during the entire charging cycle.

You may also charge an additional battery on the side with the extra cost slightly used Inogen One G4 external battery charger, through any standard wall outlet.

Which is ideal when on vacation or when running errands, as you can leave an extra battery on the external battery charger and once you return you will have a fully charged battery.

Charging Duration:

  • Single Battery: Up to 3 Hours with AC or DC Power
  • Double Battery: Up to 5 Hours with AC or DC Power

Protective & Customizable Carrying Bag

With your restored ability to jump in the car to run errands, or take that long road trip to see your family that you never thoughInogen One G4 Carry Bagt
would be possible again. You’ll want to preserve and extend the life of your slightly used Inogen One G4 by keeping it protected from scratches, bumps, and minor drops during use with the included carrying case.

The slightly used Inogen One G4 carry bag not only provides cosmetic protection for your slightly used G4, you can also attach the included shoulder strap to it.

This adjustable shoulder strap can either be attached directly to the sides of the slightly used G4, or if you choose to use the protective carrying case, the shoulder strap will attach directly to the case.

You can then adjust the fit of the strap to your exact preference to enjoy unmatched protection the entire time you are using the concentrator.

A common fear many patients have when considering whether to use a protective carry bag or not, is the fear of overheating and damaging their oxygen concentrator.

With the slightly used Inogen One G4 you won’t have to worry, as the carry bag features ventilated mesh around the battery to maintain an optimal operating temperature.

Spend More Time Living & Less Time Maintaining

Frequent maintenance with anything is a huge pain in the butt, and medical oxygen maintenance is certainly no exception. WhenInogen One G4 Inlet Filter and Exhaust you make the upgrade to the slightly used Inogen One G4, you will be responsible for one very simple aspect of regular maintenance, cleaning and replacing the inlet filter.

Located on the side of the slightly used G4, the inlet filter can be easily removed for regular cleanings or replacement in seconds. The best part is, the inlet filter is built to be reused.

To extend the life of the air inlet filter, you should perform regular cleanings every 1-2 weeks using warm soap and water. If you live in a humid environment or have pets, you may need to clean the filter more frequently.

After continuous usage of the slightly used Inogen One G4 and filter cleanings, if you notice the filter’s efficiency declining you should completely replace the low cost inlet filter.

Disruption Free Operation

Whether you are attending a movie with friends and family, or looking for a new book series at the library, you won’t have to worry about disrupting others around you with the operation of your slightly used Inogen One G4.

On a pulse setting of 2, the slightly used G4 has an ultra quiet operation of 40 decibels. Which can be compared to the sound level of a library or bird calls (44 decibels).

Slightly Used Inogen One G4 Accessories:

  • Single Battery
  • Double Battery
  • AC Power Supply
  • DC Power Cord
  • Carrying Case
  • Shoulder Strap
  • External Battery Charger


Dimensions: 5.91″ L x 2.68″ W x 7.2″ H
Weight: 2.8 Pounds (w/ single battery); 3.3 Pounds (w/ double battery)
Flow Rate: Pulse Settings: 1-3
Battery Life: Single Battery: Up to 3 Hours and 15 Minutes; Double Battery: Up to 4.5 Hours (Both on Pulse Setting 2)
Power: AC Power Supply: 100-240V, 50-60Hz; Auto Sensing to Allow Worldwide Use
FAA Approved: Yes
Warranty: 3 Years
Operating Altitude Up to 10,000 ft.

Additional information

Weight 8.0 lbs
Dimensions 5.91 × 2.68 × 7.79 in


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