OxLife Liberty2 - True Continuous Flow - Portable Oxygen Concentrator

Product Guide | Main Clinic Supply

Continuous Flow Up to 2 LPM. The Most Pulse Dose Settings of Any Wearable POC. Under 7 Pounds. Made in the USA.

Courtney Sornberger
Chief Sales Officer & POC Sales Expert — 14+ Years at Main Clinic Supply
Reviewed and verified by Mark Luther, CTO & Certified Oxygen Specialist

The O2 Concepts OxLife Liberty2 solves a problem that most portable oxygen concentrators cannot: how do you get continuous flow oxygen in a device light enough to wear over your shoulder all day? Most portable concentrators that offer continuous flow require a rolling cart because the hardware required to produce a steady oxygen stream adds significant weight. The Liberty2 delivers continuous flow up to 2 LPM at just over 7 pounds with the battery, worn in its included carry bag.

Beyond the weight achievement, the Liberty2 offers the widest pulse dose range of any wearable portable concentrator currently available. Its 10 pulse dose settings, with bolus volumes from 8 to 80 mL, cover a broader range of prescriptions than any comparable device in its weight class. For patients who need both the flexibility of pulse dose during activity and continuous flow at rest or during sleep, the Liberty2 handles both in one compact unit.

At Main Clinic Supply, we have worked with O2 Concepts products for years. The Liberty2 is the device we recommend when a patient needs continuous flow capability but also needs to be hands-free and mobile. It is built in the USA, backed by a 3-year warranty, and includes DNA Technology for remote monitoring by caregivers and healthcare providers.

Overview of the OxLife Liberty2

O2 Concepts is a U.S.-based manufacturer that focuses exclusively on oxygen therapy devices. The OxLife Liberty2 is their second-generation Liberty-line portable concentrator, released in 2022. It builds on the original Liberty by extending continuous flow from 1.5 LPM to 2.0 LPM and expanding pulse dose coverage from nine settings to ten, while maintaining the compact wearable form factor that defines the Liberty line.

The defining engineering achievement of the Liberty2 is delivering 2.0 LPM continuous flow in a 6.35-pound device worn like a shoulder bag. Traditional portable concentrators that achieve this flow rate require a cart because the molecular sieve beds and compressor needed for high-output continuous flow production are heavy. The Liberty2 achieves this through O2 Concepts' patented Energy Smart Technology, which optimizes compressor operation for maximum efficiency, and a compact dimensional footprint of under 10 inches in any direction.

The Liberty2 is designed for 24/7 use on AC or DC power. It functions as a home unit when plugged in and a travel unit when running on battery or car power. For patients prescribed up to 2 LPM continuous flow who do not want a rolling cart, it is currently the only wearable option that fills that prescription.

Full Specifications

Key Features

• Wearable continuous flow: 2.0 LPM continuous flow in a device worn over the shoulder, not rolled on a cart
• Widest pulse dose range of any wearable POC: 10 pulse settings with bolus volumes from 8 to 80 mL cover more prescriptions than any comparable device in this weight class
• 7 continuous flow settings: Fine-grained increments of 0.25 LPM from 0.5 to 2.0 LPM allow more precise prescription matching than devices with only 0.5 LPM increments
• Battery charges on all settings: Run and charge simultaneously on AC or DC power; battery charges in under 2.5 hours
• DC power on all settings: Unlike some portable concentrators that restrict car power to lower flow settings, the Liberty2 runs on DC power at any setting
• CPAP compatibility: The only wearable continuous flow POC that is compatible with CPAP devices
• Color LCD screen: Large, easy-to-read display with clear flow rate and battery level indicators; visible in a variety of lighting conditions
• DNA Technology remote monitoring: Healthcare providers and caregivers can track device status remotely via the Verizon cellular network
• Energy Smart Technology: Patented compressor optimization that maximizes oxygen output per unit of battery power
• Multifunction carry bag included: Shoulder bag design keeps hands free; fits in aircraft overhead bins and under seats
• Worldwide AC power: 100–240V operation eliminates the need for a voltage converter during international travel
• Made in the USA: Manufactured domestically by O2 Concepts
• 24/7 rated: Designed for continuous stationary and portable use

Oxygen Delivery Options

The OxLife Liberty2 offers two oxygen delivery modes. Your physician's prescription will specify which mode you need and at what setting. Never adjust your flow setting above your prescription without medical guidance.

Continuous Flow: 0.5 to 2.0 LPM in Seven Settings

Continuous flow delivers oxygen at a steady, uninterrupted rate regardless of your breathing pattern. The Liberty2 offers seven continuous flow settings in 0.25 LPM increments: 0.5, 0.75, 1.0, 1.25, 1.5, 1.75, and 2.0 LPM. The 0.25 LPM spacing is more precise than many portable concentrators that only offer 0.5 LPM increments. This finer resolution allows physicians to write more targeted prescriptions, particularly for patients whose oxygen needs are between whole-number flow rates.

Continuous flow is most commonly prescribed for nighttime use, for patients whose oxygen levels drop during sleep, and for patients who use CPAP or BiPAP equipment. The Liberty2 covers prescriptions up to 2.0 LPM in continuous mode. Patients prescribed above 2.0 LPM continuous flow will need a higher-capacity device such as the OxLife Independence (3.0 LPM).

Pulse Dose: Settings 1 Through 10

Pulse dose settings on the Liberty2 run from 1 through 10 with bolus sizes of 8 mL at setting 1 up to 80 mL at setting 10 (measured at 20 breaths per minute). The 10-setting range is the broadest available in any wearable portable concentrator. Most lightweight wearable units top out at settings four or five. Having settings up to 10 means the Liberty2 can serve patients with higher pulse dose requirements who previously had no option other than a heavier cart-based device.

Energy Smart Technology

Energy Smart Technology is O2 Concepts' patented approach to compressor control. It is the engineering reason the Liberty2 can deliver 2.0 LPM continuous flow and 10 pulse dose settings in a device that weighs under 7 pounds with the battery.

The Core Problem It Solves

Producing oxygen requires a compressor to push room air through molecular sieve beds that filter out nitrogen and concentrate the oxygen. Running a compressor at a constant high rate uses a lot of power, which drains batteries quickly and generates heat. Energy Smart Technology modulates the compressor in real time based on the patient's actual breathing demand. When the device detects a reduced breathing rate or a lower flow requirement, the compressor works less. The result is less wasted energy and a longer battery life without reducing the oxygen delivered when it is needed.

What It Means for Daily Use

For patients, Energy Smart Technology means the Liberty2 achieves up to 4.5 hours of battery life in a device small enough to carry over one shoulder. That covers most outings, doctor's appointments, shopping trips, and half-day travel without needing to find a power outlet or carry a second battery. For patients who previously had to choose between a light device with limited flow settings and a capable device that required a cart, the Liberty2 and its Energy Smart Technology close that gap.

DNA Technology: Remote Monitoring

DNA Technology stands for Dynamic Network Analysis. It is O2 Concepts' proprietary platform for remote monitoring of the OxLife Liberty2. The system operates through the Verizon cellular network, which means it functions anywhere Verizon cell coverage reaches, without requiring the patient to connect to a home Wi-Fi network.

What DNA Technology Monitors

• Device operational status and oxygen output levels
• Usage patterns, including hours used and average flow settings
• Alert conditions such as low oxygen purity, low battery, or device errors
• Software update status and maintenance reminders
• GPS location (device location tracking for loss or theft prevention)

Who Benefits Most from DNA Technology

DNA Technology adds meaningful value in three situations. First, for adult children or remote caregivers who want to verify that an elderly parent's device is running correctly without a daily phone call. Second, for home health agencies managing multiple patients who need usage data without in-person visits. Third, for patients who want the reassurance that a device problem will generate an alert rather than go unnoticed.

The GPS tracking feature also provides a practical benefit for travel. If the Liberty2 is lost or left behind in a hotel, the GPS record can help locate it.

Battery and Power Options

The OxLife Liberty2 runs on three power sources and can charge its battery while delivering oxygen on any power source. You are never forced to choose between charging and using the device.

Rechargeable Battery

The Liberty2 ships with one rechargeable lithium-ion battery that provides up to 4.5 hours of run time depending on the selected setting. Battery life is longest at lower pulse dose settings and shortest at continuous flow 2.0 LPM. The battery recharges in under 2.5 hours, which means a midday charge during lunch or a rest period can add hours of run time to your afternoon and evening.

Additional batteries are available for purchase separately. Carrying a second charged battery effectively doubles your time away from an outlet, which is useful for air travel, full-day outings, or situations where DC car power is not available.

AC Power (Home, Hotel, and Office Use)

The Liberty2 AC power supply operates on 100 to 240V at 50 or 60 Hz. This covers standard U.S. outlets (110–120V) and international outlets (220–240V) without a voltage converter. You need only a plug adapter for the outlet shape when traveling internationally. Maximum AC power consumption is 150W, which is within the operating limits of most standard outlets worldwide.

DC Power (Car, RV, and Boat Use)

The included DC power supply connects to any standard 12V vehicle power outlet (the type sometimes called a cigarette lighter port). It operates at 11.5 to 15V, 10A with a maximum draw of 120W. A key advantage of the Liberty2 on DC power: unlike some portable concentrators that limit DC use to lower flow settings, the Liberty2 runs on DC power at all settings, including the highest continuous flow and pulse dose settings. This means you can use the full capability of the device in any vehicle with a standard 12V outlet.

Who Is the OxLife Liberty2 Right For?

The Liberty2 fills a specific gap in the portable oxygen concentrator market. It is the device for patients who need continuous flow oxygen but refuse to give up mobility. If rolling a cart is not an option for your lifestyle, the Liberty2 is worth a very close look.

The OxLife Liberty2 Is a Strong Match If You:

• Need continuous flow oxygen up to 2.0 LPM for any part of your day, including sleep, rest, or activity
• Want a wearable device that keeps your hands completely free
• Use or plan to use a CPAP or BiPAP machine and need oxygen compatible with it
• Need pulse dose settings above five or six, which most lightweight wearable units do not offer
• Travel frequently and need a device that fits in a carry-on bag or under an airline seat without a cart
• Want a caregiver or physician to be able to monitor the device remotely
• Want the most prescription-versatile wearable POC available

You May Want to Consider a Different Device If You:

• Need continuous flow above 2.0 LPM, which requires the OxLife Independence (3.0 LPM) or a stationary concentrator
• Only need pulse dose settings 1 through 4, in which case a lighter pulse-dose-only unit like the Inogen Rove 4 (2.8 lbs) may be a better fit
• Need more than 4.5 hours of battery run time away from any power source and do not want to carry a second battery

Flying with the OxLife Liberty2

The OxLife Liberty2 meets FAA acceptance criteria for use aboard commercial aircraft. It is on the FAA's list of accepted portable oxygen concentrators, which means U.S. airlines are required to permit passengers to use it in-flight. Its compact dimensions (9.9 x 9.9 x 3.8 in.) fit under most airline seats without a cart.

Steps for Air Travel with the Liberty2

1. Notify your airline at least 48 hours before departure. Most airlines require a call to their special services or medical assistance department. They will confirm requirements and note the device on your reservation.
2. Obtain a letter from your prescribing physician stating your oxygen prescription, that you require supplemental oxygen during flight, and identifying the OxLife Liberty2 as your device.
3. Bring sufficient battery power to cover at least 150% of your total travel time, including layovers. With one standard battery providing up to 4.5 hours, plan accordingly for longer travel days.
4. Bring the FAA acceptance documentation included in your Liberty2 package, or download the current O2 Concepts FAA letter from the O2 Concepts website.
5. Arrive at the airport with extra time. TSA screening of medical devices can take additional time at the security checkpoint.

OxLife Liberty2 vs. Other Portable Oxygen Concentrators

The table below places the Liberty2 alongside three other portable concentrators we carry. These are the criteria our specialists use when matching a device to a patient's prescription and lifestyle.

Inogen Rove 6 and Rove 4 battery life figures vary by column count and activity level; consult Inogen published specifications for current values. OxLife Independence specs sourced from O2 Concepts manufacturer data.

Warranty and Service

The OxLife Liberty2 warranty information below is sourced directly from the official O2 Concepts Limited Warranty Statement for the Oxlife Liberty and Liberty2, document 800-1092 Rev C, dated March 2024.

The battery warranty covers batteries that fall below 80% of rated capacity when fully charged. Warranty is non-transferable and requires the original purchase receipt. Products must be inspected within 30 days of delivery before first use to establish warranty eligibility.

Warranty Exclusions

The O2 Concepts warranty does not cover damage from drops, liquid exposure, cigarette or e-cigarette smoke, improper storage, unauthorized repairs or modifications, or use of non-O2 Concepts parts or accessories. Using third-party batteries or power supplies can void the warranty.

Main Clinic Supply Service Center

Main Clinic Supply operates an Independent Authorized Service Center in Rochester, Minnesota. Our CTO Mark Luther leads a team of certified technicians specializing in portable oxygen concentrator maintenance and repair. If your Liberty2 requires service, contact us at 507-322-0247 to work with our service team directly.

What's Included with the OxLife Liberty2

The standard OxLife Liberty2 package (model 800-0007-1V) ships with:

• OxLife Liberty2 concentrator unit
• One rechargeable lithium-ion battery
• AC power supply (100–240V)
• DC power supply (car adapter, 12V)
• Multifunction carry bag with shoulder strap
• User manual
• FAA documentation

Price and Financing Options

HSA and FSA Eligible

The OxLife Liberty2 is a prescription medical device and is eligible for purchase using a Health Savings Account (HSA) or Flexible Spending Account (FSA) debit card. Check with your benefits administrator to confirm your plan's specific rules before purchasing.

Financing

Main Clinic Supply offers financing options through third-party lenders for qualified buyers. Financing lets you spread the cost of the device over monthly payments. Eligibility and terms are presented at checkout. Contact our team if you want to discuss financing options before you begin the purchase process.

Does Medicare Cover the OxLife Liberty2?

Medicare Part B covers home oxygen equipment when a physician documents medical necessity through qualifying blood oxygen saturation test results. However, Medicare typically covers the rental of stationary home oxygen equipment, not the outright purchase of a portable concentrator. Many patients use a Medicare-covered stationary concentrator at home and purchase the Liberty2 out of pocket for travel and daytime use.

Coverage is highly dependent on your specific diagnosis, your physician's documentation, and your individual Medicare plan. Our specialists work with patients navigating Medicare oxygen coverage regularly. We can help you understand what questions to ask your plan administrator before you purchase.

Routine Maintenance

The OxLife Liberty2 requires minimal routine maintenance. O2 Concepts designed it for everyday portability, which means the maintenance tasks are straightforward and do not require technical expertise.

Particle Filter

The Liberty2 draws room air through a particle filter before concentrating the oxygen. Inspect the filter weekly in dusty or smoky environments. Under typical home conditions, monthly inspection is adequate. To clean it, remove the filter, rinse gently under warm water, allow it to air dry completely, and reinstall it. Never put a damp filter back into the device. A restricted filter makes the compressor work harder, reducing performance and shortening the life of internal components.

Exterior Cleaning

Wipe the exterior of the unit with a damp cloth and mild soap as needed. Do not spray liquid directly onto the device. Keep the carry bag clean; a soiled carry bag can transfer debris to the air intake area over time.

Nasal Cannula Replacement

Replace your nasal cannula at least every two weeks under regular use. Skin oils and bacteria accumulate in the cannula tubing. A clean cannula reduces infection risk and ensures unobstructed oxygen flow from the device to your airway.

Battery Care

The Liberty2 uses a lithium-ion battery. Do not leave a fully discharged battery sitting unused for extended periods, as deep discharge degrades lithium-ion cell capacity over time. If you will not be using the device for more than two weeks, store the battery at approximately 50% charge in a cool, dry location away from direct sunlight and heat sources.

Professional Service

O2 Concepts recommends periodic professional service to verify oxygen purity output and inspect internal components, particularly the sieve tubes. Sieve tube degradation is a normal wear item over years of use and is covered under the 1-year sieve tube warranty. Contact Main Clinic Supply at 507-322-0247 to schedule a service inspection.

Frequently Asked Questions About the OxLife Liberty2

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Disclaimer: This product information is for educational purposes. Specifications are sourced from O2 Concepts manufacturer data, including the official Liberty2 specification sheet and the O2 Concepts Limited Warranty Statement (document 800-1092 Rev C, March 2024), as of May 2026. Specifications are subject to change by the manufacturer without notice. This page is written for the Liberty2 (model 800-0007-1V); if the product sold at this URL is the original Liberty model, please update all product-specific specifications accordingly before publishing. This page does not constitute medical advice. Always follow your physician's prescription for oxygen flow settings and delivery mode. A valid physician prescription is required to purchase this device. Medicare coverage information reflects general 2026 guidelines; consult your plan administrator for coverage determinations specific to your situation. Main Clinic Supply is an independent authorized dealer and service center and is not affiliated with O2 Concepts.