CPAP Battery Power

October 27, 2017 | CPAP Benefits |

For patients who treat sleep apnea with CPAP therapy, it is always best to prepare for the unexpected power outage. This is particular true if you live in an area prone to rough weather (hurricanes, tornadoes, snow avalanches) or natural disasters (ie, forest fires or earthquakes). But even if you live in a stable environment, power outages are often unforeseeable and can leave you without the therapy you need. Therefore, we recommend always having an alternative battery on hand.

In general, we find that our CPAP customers are much more informed about the importance of compliance. Going a night without CPAP therapy, for most users, is something they try to avoid at all costs. Yet, surprisingly, most PAP users do not have an alternative power source available in case of an unforeseen circumstances or last-minute travel.

A recent survey of 150 people found that nearly 85% of CPAP users always take their CPAP when they travel.

85% CPAP users travel with their machines

From a health perspective, this is terrific news. According to WebMD, “Even one night of not using the machine can make you sleepy the next day.” And, when use is intermittent, the benefits are reduced considerably.

We asked our survey respondents whether they have ever used a CPAP battery to power their machine. Given the low availability of effective batteries, only 13% of our 158 respondents have ever used a CPAP on a battery! However, only 21% responded that they did not have an issue with frequent power outages.

Only 13% CPAP Users Power machines with batteries

One year later, we asked the same question again with slightly different results. Only 29 of our 333 respondents used a battery to power their CPAP machines. That’s less than 10% of CPAP users who own a battery backup for emergencies or travel. It’s also a slight decrease from 13% to 10% of CPAP users! We can only speculate that our CPAP users are either traveling less frequently or are not concerned about power loss.

Only 10% of CPAP users own a backup CPAP battery

In fact, 27% of CPAP users are unaware that new CPAP lithium ion batteries are lightweight, very portable, and relatively inexpensive. In fact, many of our subjects did not even know CPAP batteries were available to power their machines!

CPAP users and lithium ion batteries

People on CPAP do not necessarily need a battery backup unless they are going somewhere without access to power. Also, day-long power outages are fairly uncommon across most of the United States.

CPAP Battery Backup – It’s Not Just for Camping!

Unfortunately, as you may now realize, a backup battery for your CPAP can be useful in many circumstances not just camping. Hopefully, the recent forest fires passed you without much trouble. The next time power is out in your area, a CPAP battery can deliver uninterrupted power for your CPAP therapy. 

As you will see, CPAP battery backup is easy, affordable, and offers peace of mind. A really impressive CPAP battery backup system is the Freedom CPAP Battery. It replaced many of the older batteries with more unique features, a smaller size, and longer life. 

In addition, we asked our users whether their CPAP therapy had ever been interrupted by a power outage.

Only 33% of CPAP users have experienced a power outage that interrupted therapy

Flooding in Houston, hurricanes off the Florida coast, tornadoes in the Midwest, and forest fires in California have knocked out power for extended periods. It made people realize the need for a backup CPAP battery system. Fortunately, people with a CPAP battery backup for their CPAP machines can breathe a sigh of relief.

We asked our 29 CPAP Battery users if they were satisfied with their backup batteries and almost all of them were highly satisfied with the backup battery option.

Most CPAP battery power owners are satisfied

How Batteries Power a PAP Machine

Most PAP machines work with either AC or DC power. Wall outlets in the United States produce 110 volts while in Europe outlets produce either 220 or 240 volts. Most batteries output 12-volt DC power. There are several types of batteries that can power a PAP machine. In some cases, the CPAP machine will require an inverter fromDC to AC power. If an inverter is required, it will reduce the number of hours received from the battery. It’s important to check with your equipment provider to determine what type of equipment and power cords you will need.

Longest CPAP Battery Power Source

The deep-cycle marine battery will power PAP machines the longest. With some pressure settings your PAP machines can run up to 3 days. You can buy a deep-cycle marine battery at any auto supply store. They are great for RVing and for when the power goes out at home.

You can purchase the inverter and power adapters necessary for your PAP machine from our battery power cables page here.

Another Battery that Can Power a PAP

Many manufacturers have recognized the need for batteries specifically designed to power PAP machines. In 2019, there are several PAP machines that have integrated or specialized batteries. These include:

DreamStation Go Travel CPAP with Battery Pack

  • Only 1.86 lbs with built-in power supply for fewer parts
  • Integrated rechargeable battery (optional)
  • Integrated heated humidification powered by tap water (optional)
  • Complies with FAA standards for in-flight use

HDM Z2 Auto Travel CPAP Machine

  • Only 10.5 ounces and ultra-small
  • Integrated battery (optional)
  • Waterless humidification
  • Complies with FAA standards for in-flight use

ResMed AirMini Auto Travel CPAP Machine

  • Only 10.6 ounces and fits in the palm of your hand
  • Waterless humidification
  • Ultra-quiet operation
  • Complies with FAA standards for in-flight use

Lithium ion batteries are lighter, smaller, and have options like USB ports and dashboards that indicate battery life. Additionally, all major brands of CPAP machines work with battery power using an adaptor.

The machines with integrated batteries are the easiest to connect. We asked our 29 survey respondents what type of battery they were using and most of them used a rechargeable battery.

Most CPAP users own lithium ion CPAP batteries

CPAP Battery Power Packs

PAP Battery Packs offer an all-in-one power solution using the DC power adapter connected directly to a battery pack. Battery packs can power a PAP from 8 to 24 hours depending on pressure settings. Most battery packs cannot power heated humidifiers. Also, passive humidity (supplied by the humidifier without turning on the heated option) can increase the power usage. As a result, 66% of survey respondents indicated that the battery does last long enough.

Survey showing CPAP users think their CPAP battery lasts long enough

Battery packs can be expensive. But for travelers, and campers, and those living in areas prone to power outages, a battery pack is worthwhile.

Here are a few different battery pack options currently available at The CPAP Shop:

Medistrom Pilot-12 Lite CPAP Battery Backup Power Supply (for Respironics)
FAA-approved for use in remote locations where main power is not available, such as camping, road trips and during air travel.

Medistrom Pilot-24 Lite CPAP Battery Backup Power Supply (for ResMed)
The built-in USB port allows the Pilot-24 Lite to power countless handheld electronic devices, including mobile phones and cameras. It can also be used as a charging station for various electronic devices.

Freedom Travel CPAP Battery 

Since many people won’t spend over $300 on CPAP battery power. The Freedom Travel CPAP Battery is priced at only $269.95! This battery is compatible with all PAP machines (although some machines require a specific dc cable). It is lithium ion and meets all current FAA requirements. The battery can be used to power other devices that use a 5V USB port. This includes cell phones, and tablets and it even has an option for charging in a vehicle or by solar power.

If you need helping picking the right battery for your machine, please call 866.414.9700or email us at

It’s Easy to Connect CPAP Battery Packs to Tour CPAP Machine

Over the years, we’ve posted several videos on our site that outline how to connect batteries to CPAP machines. We want users to be able to continue their CPAP therapy even during times when power is not available. A CPAP battery pack would also give them the freedom to travel anywhere.

Some of the machines have special converters that must be used when hooking up to CPAP battery packs. All of the batteries have approximately 6 ft cable lengths. When using battery power, you don’t have to be right next to the power source.

In addition, our survey respondents think it is very easy to connect their machines to a battery. Some of the older machines need an inverter in order for the battery to work. The CPAP machine plugs into the inverter, and the inverter plugs into the battery. A small amount of battery power is lost, but not enough to affect therapy.

Most CPAP users find it easy to connect to a battery

We produced a video about several different CPAP machines and how you can use them with a CPAP battery. You can see specs for the other batteries by watching the video here.

Chris Vasta demonstrates in a recent video how to connect the Philips Respironics Dream Station machine to its battery. In the video, Chris sets up the battery so that it will kick into action if the power goes out. For the demo, he uses the lithium ion Phillips Respironics travel battery. It weighs only 2.25 lbs, and is FAA approved for airline travel. As Chris quickly demonstrates, all it takes to power a CPAP machine with this battery is a simple one-cable connection.

Our customer care team is here to answer your questions. Give us a call 866.414.9700 or send an email to

Chris Vasta is the president of The CPAP Shop and an expert in sleep and respiratory therapy. He often provides insights on product design and functionality on various manufacturers’ prototypes and is frequently tapped to provide reviews on new releases.

Chris Vasta


Chris Vasta

Over a 10+ year career at PHH Mortgage managing a $100 million portfolio, Chris Vasta learned the ins and outs of the business world. He learned how to establish business relationships, lead a multi-prong team, and implement strategies for long-term growth. In 2007, Vasta used that experience to transition his role into president of The CPAP Shop. Over his tenure, Vasta has been involved in everything from website design to warehouse layout. His hands-on approach with customers has evolved into an in-depth understanding of the challenges of beginning and adhering to sleep therapy. He often provides his insights on product…

35 Comments Leave new

  • Claudia Morrow

    Hi, I also have a Phillips Respironics System One. Above, you recommended the Freedom battery as a backup but your website now says the Freedom battery is discontinued. Is there a good alternative?

  • Denis Carpenter

    I am looking into the ResMed 90W DC converter for my CPAP machine while camping. How long will I have to charge my deep-cycle battery every day while I’m driving to run the CPAP each night (for eight hours)?

    • Andrew Rivenbark

      Hi Denis, that ultimately depends on how you are charging your battery, how discharged it is when you begin charging, and what the battery is rated at. A deep cycle battery with a 100Ah rating will run a CPAP for approximately 26 hours before needing to recharge.

  • Ray

    Hi, I have a ResMed AirSense10 (no humidifier) , cannot I use a Uninterruptible Power Supply (UPS) like the CyberPower 1500VA / 900Watts as a power backup for home power outage?
    Thank you.

  • Susan

    Greetings. This column says “Most battery packs cannot power heated humidifiers”. Are there any travel battery packs that CAN power a heated humidifier?

    • Chris Vasta

      The only battery pack that is intended to be used with a humidifier, is the P10 battery for the Transcend365 Travel Machine. However, even with that Travel machine, the usage time is dramatically lower if the humidifier is used. If you use the humidifier you can expect to get Roughly 5.81 Hours When Using the Humidifier. 26 Hours Without Using the Humidifier at pressure 12cm. Otherwise, you would need a Deep Cycle marine battery or a generator.

  • George

    How do I connect a 12volt car battery to my ResMed C-Pac

  • Julie

    Are there any batteries that are always attached and kick in automatically when the power goes out?

  • Dr Chauhan

    I am looking for a battery for the Transcend P8 Multi-Night Battery compatible as this battery is very expensive. Do you have anything I could use up a mountain. I need 8 days of power.

    The dimensions of the Transcend P4 Battery are 104mm x 80mm x 23mm, while it weighs 0.28kg. It takes under five hours to charge when fully depleted, providing 7-9 hours of power at 14cmH2O. It has an output of 14.4V, with a capacity of 2.6Ah or 37Wh.

    The dimensions of the Transcend P8 Battery are 110mm x 80mm x 42mm, while it weighs 0.5kg. It takes under eight hours to charge when fully depleted, providing 14-16 hours charge at 14cmH2O. It has an output of 14.4V, with a capacity of 5.2Ah or 75Wh.

    • Chris Vasta

      Hello, Dr. Cuauhan. We do not have a battery that would last 8 nights with one charge. What CPAP machine are you going to be using?

  • Sheri Gailey

    I have a Phillips Respironics REMstar A-Flex System One CPAP. My father is going to loan me his Medistrom Pilot 24 lite battery for a trip I am taking next week. Is there a way to make this battery compatible with my CPAP machine?

    • Chris Vasta

      The Medistrom Pilot 24 is not compatible with the Philips Respironics System One. The Philips Respironics run on 12 Volt, and the Resmed run on 24V. The Medistrom 24 battery is only intended to be used with Resmed machines, and there is not a way to make it compatible with the System One. The Freedom battery would be your best option if you are looking to purchase a battery.


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