5L Portable Oxygen Concentrator with 8 Hours Battery

السعر بعد الخصم$1,780.00 USD السعر قبل الخصم$3,080.00 USD
وفِّر $1,300.00


  • 50% Larger Oxygen Flow than small POCs
  • Big Touch Screen
  • Mobile Phone Remote Control
  • With Two Batteries (up to 8 hours total)
  • 1 Hour Fast Charging by Car and Home Power
Warranty: 5 Years (New machine replacement if failures within 365 days)

Large Flow Portable Oxygen Concentrator

Attention before order:

Can we ask whether you buy it for family members or for personal?

If you buy for a family member, may I ask how old he is? What respiratory disease does he suffer from? How many liters of oxygen does he need right now?

The oxygen concentrator is used for health and life. The demand may vary in different situations. Usually, we need more oxygen in our daily activities, outdoor activities, and travel than sitting at home. Besides, your family member might need more oxygen as time goes by. We must consider them.

After receiving your reply, we will determine which model suits you give you our professional suggestions.

How the pulse flow settings equal to continuous flow

Many clients are wondering how the pulse flow settings equal to continuous flow. The following formula might be helpful for you to understand:

Our bodies naturally inhale and exhale at rest in a 1:2 ratio. This means we inhale in 1/3 time. Under the model of 1-liter continuous flow, we only inhaled 1/3 oxygen (333ml) in one minute. Because pulse flow only deliver oxygen when inhale. So the pulse flow can be same effect as 1LPM by delivering that add up to 333ml oxygen in one minute of inhalation time. If pulse flow want to be equal to 2LPM, 3LPM, 4LPM and 5LPM, directly use 333ml multiply by a multiple.

Trade-off & Visible Effect:

To be lighter and have a longer battery time, old devices sacrificed oxygen dosage, reducing the dose from 333ml per flow setting to 210ml. The difference may not be noticeable when the user's illness is mild. As the disease progresses and the need for oxygen increases, it becomes apparent that patients feel a lack of oxygen. There are many customers with illnesses that develop to moderate have reported this situation.

When designed the SG02L, we sacrificed weight and battery time and took sufficient oxygen (333ml/gear) as the core feature. Although SG02L will be 0.3kg to 0.4 kg heavier, the treatment performance is better. It can reach truly effect of 1LPM to 5LPM, meeting the needs of different conditions. We think safety and reliability are more crutial for our clients. We believe that such a sacrifice is worth it.

Big Touch Screen - Visually Friendly

There is a 4.3'' screen with a wonderful touch design, two times bigger than previous devices, making it user-friendly in daily life.

Remote Control by Mobile Phone

Lovego has a mobile phone App supported by Bluetooth to monitor oxygen therapy and do remote control through the phone. This design is mainly to facilitate people's use when going out, sitting in wheelchairs, and lying in bed. They don't have to struggle to get the machine and then press the button. In addition, they can also monitor their oxygen therapy in real-time on their phones.

Specifically, the app allows you to:

  • Turn on/off machine, turn up/down flow rate on the mobile phone based on activity level or symptoms
  • Monitor your respiratory condition and oxygen supply levels in real-time
  • View the remaining battery time to better plan usage and recharging

No matter where you are - whether seated in a wheelchair, resting in bed, or anywhere else - you can easily adjust settings and monitor your status with just a tap on your phone. This offers much more flexibility and accessibility than having to manually operate the device.
Overall, wireless smartphone control provides greater freedom, convenience, and confidence when using your portable concentrator outdoors and on the go.

Battery Time and Recharge

One battery could support machine work for up to 4 hours. Two batteries can work up to 8 hours.

Plus, the lithium battery can be charged fully in 1 hour both in the car and on home power. It can always be ready even if you choose to take off on a trip without planning. There is no need to stress about battery time anymore. It might be best for your sudden trips.

If you pursue a longer battery time, just purchase extra batteries. It's small size and lightweight to carry.

Battery Time / Battery Duration
Flow SettingsTotal volume per minute (ml/min)Standard BatteryExtra Battery
1400 ml4 hours8 hours
2660 ml3 hours6 hours
31000 ml2 hours4 hours
41340 ml1.5 hours3 hours
51680 ml1.2 hours2.4 hours
Standard Battery Charging Time:
● Takes 1 hour to fully charge when the machine is off.
● When the machine is in use, it can take between 1 and 6 hours to fully charge, depending on the flow settings.

External 14 hours battery for camp travel

Considering particular demands for super-long battery time for camp and caravan travel, an external battery with a capacity of up to 14 hours is an option as a backup.

If you place an order for an external battery together, there is a discount of $170.

Lovego matches a pair of sunglasses nasal cannula for every SG machine. By wearing sunglasses nasal cannula, there will be no more tubes on our faces. It effectively solved the friction between the oxygen tube and the face and ear during long-term oxygen therapy.

When we go outside, people will no longer see someone on oxygen, but rather the vibrant person we really are. It can be equipped with myopia lenses, presbyopia lenses, and astigmatism lenses.

We can just be ourselves.

Package Contents

Oxygen concentrator unit

Packaging box


Standard adapters

Car power adapters


Oxygen tube

Comprehensive user manual


Check out our FAQs and feel free to contact us if you need more help.

Our customer support is available Monday to Friday: 8am-8:30pm.Average answer time: 24h

One-Stop Guide for Picking Your Ideal Portable Oxygen Concentrator

Portable oxygen concentrators provide freedom and convenience for patients requiring long-term oxygen therapy. They supply vital mobile oxygen for everyday activities, travel, and doctor visits. However, choosing the right portable concentrator can be more complex than it seems.

Unlike stationary home oxygen systems that provide a steady, continuous flow, portable concentrators use a pulsating flow that is less straightforward to understand.

In addition, the market is flooded with non-medical grade portable concentrators. Many doctors struggle to distinguish these devices from medical-grade options. As a result, patients often end up purchasing units that do not actually meet their oxygen therapy needs.

Importantly, the concealed aspect of oxygen deficiency often results in patients not being aware that they're getting inadequate oxygen from an inferior portable concentrator. Their bodies, persistently enduring a state of long-term low oxygen, gradually worsen over time.

To make matters worse, doctors are unlikely to know that you are not getting enough oxygen supplements when you get back home. So, doctors are hardly able to find the real reason. It can lead doctors to make the wrong diagnosis and, in turn, postpone the right treatment, causing the condition to deteriorate further, again and again.

To help avoid these critical issues, we have written this comprehensive guide. Our goal is to equip patients and their families with the knowledge to choose the ideal portable oxygen concentrator. Armed with the right information, you can choose a portable concentrator by yourself that will genuinely improve your quality of life and avoid potentially serious pitfalls.

The key steps this guide will cover are:

  • Understanding your oxygen prescription and how to adjust flow rates based on your needs and activity levels
  • Learning the difference between continuous flow and pulse flow systems
  • Learning how to identify the oxygen capacity of pulse flow
  • How to identify the non-medical grade concentrators
  • Recognizing the dangers of non-medical grade concentrators

Here we go, let's look at how doctors issue oxygen prescriptions. What are the clinical guidelines for doctors prescribing long-term home oxygen therapy for patients whose condition is stable? Can we adjust the oxygen flow by ourselves?

I. Understanding Your Oxygen Prescription

The Guide to Long-Term Home Oxygen Therapy
Doctors follow specific clinical guidelines when prescribing home oxygen therapy. The goal is to keep your blood oxygen saturation (SpO2) within a target range based on your condition:

  • If you're a patient with Type I respiratory failure, or if there's no high risk of holding onto too much carbon dioxide in your body, the aim is to keep your blood oxygen saturation (SpO2) levels from 94% to 98%.
  • On the other hand, patients dealing with Type II respiratory failure—often seen in chronic lung conditions like Chronic Obstructive Pulmonary Disease (COPD)—or those at high risk of retaining excess carbon dioxide should try to maintain blood oxygen saturation (SpO2) levels between 88% and 92%.
  • For COPD patients specifically, it's usually enough to maintain their blood oxygen saturation (SpO2) level just above 90%. This helps prevent making their condition worse by causing them to retain more carbon dioxide. It's not necessary to strive for significantly higher blood oxygen saturation levels.
  • The prescription flow rate is given in LPM (liters per minute) of continuous oxygen flow. You should use the prescribed oxygen for at least 15 hours per day. If you can reach 18 hours per day, it will be better.

How to Adjust Your Flow Rate
Doctors may prescribe oxygen flow rates for four conditions based on your oxygen needs:

  • Resting
  • Daily activities
  • Exercise rehabilitation
  • Sleep

If your prescription only provides one flow rate, that rate is for resting. You may need to adjust the flow rate for other activities to keep your oxygen saturation (SpO2) levels in your target range.
General guidelines for adjusting flow rate:

  • Activities: Resting rate x (100-150%)
  • Exercise: Resting rate x (150-200%)
  • Sleep: Resting rate + 1LPM

Considering issues such as insufficient ventilation during nighttime sleep, decreased respiratory muscles, and sleep apnea, if oxygen deficiency occurs during sleep, the nighttime oxygen flow can be increased by 1LPM (Liters Per Minute) based on the oxygen flow during quiet rest.

Key Points
Keep a close watch on your oxygen saturation levels (SpO2) and adjust the oxygen flow accordingly to stay within the desired range. Remember, our bodily requirement for oxygen flow is regulated by blood oxygen saturation (SpO2), so that's the crucial factor we need to prioritize.

  • Increase flow if your oxygen saturation level drops below the target range
  • Decrease flow if your oxygen saturation level rises above the target range
    Your oxygen saturation level will stabilize in 3-5 minutes after each adjustment of flow rate.

Doctors often recommend having a 5LPM concentrator at home. This covers:

  • Stable periods (1-2 LPM needed)
  • Infections/flare-ups (3-4 LPM may be needed)

If even 5 LPM cannot maintain your target oxygen saturation level range, your condition may require medical intervention.

Now that we understand your oxygen needs in different situations and the doctor's motive. Next, we must ensure the portable concentrator meets your daily needs, can handle increased demand during travel or stable periods, and is prepared for any future flare-ups where your oxygen needs may rise.

Portable concentrators mainly supplement oxygen when out. However, when away from home, your demand might go up at any time. And there is no option to switch to other oxygen sources. Thus, adequate oxygen-producing capacity is the most crucial factor in selecting a portable unit.

II. Differences Between Pulse Flow vs Continuous Flow Oxygen Delivery

Before choosing a portable concentrator with sufficient capacity, we first need to understand the key differences between pulse flow and continuous flow oxygen delivery.

The settings on portable oxygen concentrators are pulse flow levels - 1, 2, 3, 4, 5. Are these pulse flow levels equal to continuous flow? If not, how can we tell the difference in their capacities?

First, let's understand how they work:

  • Continuous flow: The device provides oxygen in a continuous stream. We use LPM (Liters Per Minute) to measure its rate.
  • Pulse flow: The device provides oxygen in bursts or "pulses." Oxygen is provided when you inhale (the switch activates and delivers a pulse of oxygen), and delivery ceases during exhalation. The oxygen capacity of pulse flow is determined by the volume of oxygen delivered with each inhalation.

How to Calculate the Pulse Flow

To replicate the effect of continuous flow with pulse flow, we need an equivalent dose of oxygen during inhalation in pulse mode.

So, how much oxygen do we actually inhale under continuous flow?

On average, an adult's respiratory process involves spending double the time exhaling compared to inhaling. This means that a complete breath cycle, which includes both inhalation and exhalation, designates approximately one-third of its duration to the act of inhalation.

In a scenario where there is a consistent oxygen flow rate of 1 liter per minute, we are only actually breathing in this oxygen for one-third of each minute. Therefore, the volume of oxygen we inhale in this fraction of a minute equates to 1L multiplied by 1/3. This yields a result of 0.333L or, equivalently, 333ml. Accordingly, when engineering a pulse flow system, it suffices to deliver a dosage of 333ml of oxygen in one minute (Total Volume per Minute). This would emulate the effects of a continuous oxygen delivery system operating at 1 Liter Per Minute (LPM).

To make this easier to understand, let's break down the key steps in calculating equivalent pulse flow:

  1. Adult exhalation time is 2 times longer than inhalation time
  2. So in 1 minute: We inhale for 1/3 of that minute
  3. So the total volume of oxygen we inhale in that 1/3 minute is:
  • 1 LPM of flow
  • Multiplied by the 1/3 minute we are inhaling
  • Which equals 1 L x 1/3 minute = 0.333 L = 333 ml

Therefore, a pulse dose of 333 ml (total volume per minute) delivers the same amount of oxygen as 1 LPM continuous flow in one minute. If we want the effect of a higher continuous flow rate (LPM), we can directly multiply the continuous flow rate by 1/3 to get the dose of the pulse flow.

Design principles for pulse settings typically observe the following convention: A pulse level of 1 delivers an equivalent oxygen dose to a continuous flow at 1LPM. Likewise, pulse levels 2, 3, 4, and 5 administer doses corresponding to continuous flows of 2LPM, 3LPM, 4LPM, and 5LPM respectively. Pulse flow levels are designed accordingly:

  • Level 1 aims to deliver 333 ml to equal 1 LPM, (1L x 1/3 = 0.333L = 333ml)
  • Level 2 aims to deliver 666 ml to equal 2 LPM, (2L x 1/3 = 0.666L = 666ml)
  • Level 3 aims to deliver 1000 ml to equal 3 LPM, (3L x 1/3 = 1L = 1000ml)
  • Level 4 aims to deliver 1333 ml to equal 4 LPM, (4L x 1/3 = 1.333L = 1333ml)
  • Level 5 aims to deliver 1666 ml to equal 5 LPM, (5L x 1/3 = 1.666L = 1666ml)

The following is a table of pulse doses:

Flow Setting of Pulse Flow12345
Total Volume per Minute333ml666ml1000ml1333ml1666ml

The Second Standard of Pulse Flow Oxygen Dosage

With further research on breathing, it was discovered that during inhalation, only the first two-thirds of the air enters the lungs for gas exchange. The other one-third stays in our windpipe and leaves when we exhale next.

This means if we think of a continuous flow of 1 liter of air per minute, we breathe in oxygen for about one-third of that minute. And in the time of that one-third minute, only two-thirds of the oxygen gets to our lungs for gas exchange.

So, the actual amount of oxygen used by our lungs is calculated like this: 1 Liter x 1/3 (time spent inhaling) x 2/3 (the part that reaches the lungs). This equals 0.222 liters or 222 milliliters.

With this new theory, the second standard pulse dose supply reduces the oxygen amount by one-third compared to the first standard. By reducing the oxygen dose by a third, portable oxygen concentrators can be made smaller, lighter, and have longer battery life. However, many patients have reported feeling oxygen-deprived in lower oxygen dosage settings of the second standard. And their blood oxygen levels are below therapeutic targets.

The Second Standard of Pulse Flow

Flow Setting of Pulse Flow12345
Total Volume per Minute210ml420ml630ml840ml1050ml

The second standard requires that all oxygen supplied via pulse flow must reach the lungs for optimal gas exchange. However, due to constraints like tracheitis and lung lesions in patients, achieving this ideal condition seems unattainable, and individual results vary widely. Further studies may be needed to improve to correspond with patients' real-life experiences.

Currently, there is no unified standard on the market. The oxygen dosages of pulse flow are set by the manufacturers themselves. The following are two types of portable concentrators on the market:

  • The first standard offers 333 ml/min per setting.
  • The second standard provides 210 ml/min per setting.

So, two different devices may deliver different amounts of oxygen, even at the same pulse flow setting, if they adopt different standards of pulse flow. When we want to judge the oxygen production capacity of a portable oxygen concentrator and ensure that its pulse flow can provide sufficient oxygen, we only judge by its Total Volume per Minute (TVPM), rather than the number of flow sets.

If a device's TVPM exceeds 1666 ml/min, it can ensure an oxygen supply equivalent to a 5 LPM continuous flow, which ensures that we can get enough oxygen supplement in various situations over the long term.

Please note: Doctors do not know how each manufacturer sets the pulse flow rate, so we can only rely on ourselves to identify it.

III. How to Identify Non-Medical Grade Concentrators

In addition to oxygen dosage, we must also consider the oxygen concentration of portable concentrators.

1. Neglect of Oxygen Concentration

The oxygen prescriptions that we've discussed above are all premised on the use of medical-grade oxygen, which is defined by a standard purity level of 90% or higher. However, there are still many non-medical grade portable concentrators on the market for healthy people to use on plateaus or mountain climbing.

These recreational concentrators typically can achieve up to 90% concentration, but only when operating at a flow rate of 1 liter. However, when the flow rate is increased beyond 2 liters, the concentration significantly diminishes to about 30%. This drastic drop-off falls far short of meeting medical requirements. For our patients who require long-term oxygen therapy, it is critical to know how to recognize them and avoid their pitfalls.
The key point: the medical-grade portable concentrator can maintain ≥90% concentration at all flow rates

2. Risks of Non-Medical Device Standards

Firstly, in the early stages, when oxygen needs are low, these devices may seem adequate. But as the disease progresses, oxygen needs to rise. As we increase the flow rate accordingly, we may assume we're getting enough oxygen. But in reality, the concentration has dropped too low without us realizing it. Over time, consistently receiving insufficient, low-concentration oxygen leads to chronic hypoxia and faster disease progression.

Secondly, these recreational concentrators adhere to general industrial standards, which are much less than the strictest medical standards. Therefore, they do not assume any liability for patients.
When they malfunction and stop producing oxygen, there is no alarm system to notify the user. Patients are unaware that they have been breathing normal air for an extended period, leading to rapid disease progression.
Some inferior models even display a fixed, false oxygen concentration on the screen to deceive customers. This is strictly prohibited in medical concentrators. You could identify it by checking if the concentration reading continuously changes when you adjust the flow rate. If the screen shows a motionless number, it is fake.

Thirdly, these non-medical devices can lead to misdiagnosis by doctors.
When physicians prescribe medical-grade oxygen, they assume a concentration of above 90%. However, they might not be aware that a patient is using a non-medical, recreational model. When a patient's condition worsens due to long-term use of non-medical grade oxygen at home, doctors have no way of knowing it. In this way, doctors will never be able to find the real cause of disease progression, delaying the best opportunity for treatment and causing our diseases to develop and worsen repeatedly.

If patients do not know the truth and mistakenly purchase such machines, they will not only have to spend more money on medical treatment and hospitalization in the future, but they will also suffer physical and mental pain from worsening conditions and shorten their lifespan. Therefore, it is advisable not to prioritize cost over quality when buying a medical-grade oxygen concentrator; ensure it has an oxygen concentration of 90% or higher.

3. Make an Informed Purchase

After understanding the above three key factors, we can identify the oxygen capacity of portable oxygen concentrators easily and select a suitable device to meet our needs in the long term. No one can lie to us and steal money from us anymore.

  • Knowing different needs of oxygen therapy in different situations.
  • Identify oxygen capacity by Total Volume Per Minute (TVPM)
  • Avoids pitfalls of recreational devices