Need a CPAP Battery Backup? Here Are the Types and Features to Know
If you rely on a CPAP machine to manage sleep apnea, having a reliable CPAP battery backup isn’t just a convenience. From unexpected power outages to camping in the Aussie outback, a dependable battery can keep your therapy running smoothly wherever you are.
In this guide, we’ll walk you through the different types of CPAP batteries available, what to look for when choosing one, and whether a UPS is a worthwhile option. Whether you’re travelling off-grid or preparing for emergencies, knowing your options will help you sleep easier.
What Are CPAP Batteries and Why Are They Important?
If you use a CPAP (Continuous Positive Airway Pressure) machine, you’ll know that even missing one night of therapy can leave you feeling flat. Think about fatigue, headaches, and a rough start to the day. A CPAP battery acts as a portable or backup power source, letting your machine run smoothly when mains power isn’t available—whether you’re travelling, camping, or dealing with an unexpected outage at home.
Imagine you’re halfway through a restful night’s sleep when a storm knocks out your power, or you’re camping under the stars, only to realise there’s no outlet to plug in. With a battery for CPAP machine, you won’t have to worry. It keeps your therapy running wherever you are, so you can breathe easy and sleep well, no matter the situation.
Types of CPAP Batteries
When it comes to finding the right battery for CPAP, it’s helpful to first understand both the kind of battery technology used and the different types of products available. Let’s break it down:
Different Battery Chemistry: What’s Inside the Battery?
The type of battery inside will affect how long it lasts, how heavy it is, and how quickly it charges.
Lithium-ion batteries are the most common choice for CPAP use. They’re lightweight, compact, and hold a good amount of charge, which makes them ideal if you’re travelling or need something easy to move around. They charge fairly quickly and usually last for quite a few years before needing replacement. That said, they can be a little pricier than older battery types.
Lithium Iron Phosphate (LiFePO₄) is a newer type of battery that’s become more popular in recent years. It’s known for being very safe and stable, especially when it comes to heat or long-term storage. These batteries tend to last even longer than standard lithium-ion, though they can be more expensive.
Sealed Lead-Acid (SLA) batteries are the older style and still used in some backup setups. They’re generally much bulkier and heavier than lithium-based options, but they’re tough and more affordable. Just keep in mind that they charge slower and don’t hold their charge as well over time.
CPAP Battery Options: How Are They Used?
In addition to battery chemistry, it’s important to consider the format or style of battery setup that suits your needs best.
Brand-Specific Battery Packs: Some CPAP manufacturers, like ResMed or Philips, offer their own dedicated battery packs that are designed to work directly with specific machines. These are often the simplest option—just plug it in and you’re good to go, no guesswork. However, they can be on the more expensive side.
Universal CPAP Battery Packs: Universal batteries are made to work with a wide range of machines. These often require an adapter or special cable to connect to your CPAP, but once set up, they offer great flexibility. They’re usually more affordable than brand-specific options and offer more capacity options.
Portable Power Stations: If you’re looking for something with more power—and the ability to run more than just your CPAP—a portable power station could be the way to go. These are essentially large battery units with AC outlets that can charge or power multiple devices at once. People often use them for camping, caravanning, or emergency power during outages. They’re larger and heavier than standard CPAP batteries, so they’re not ideal for plane travel, but they offer serious runtime and can often recharge via solar panels or your car.
What Are the Key Features to Consider in a CPAP Battery?
Now that you’ve got a handle on the different types out there, it’s time to dig a little deeper. The best CPAP battery should work smoothly with your machine and fit your lifestyle. Here are the most important features to keep in mind:
Compatibility with Your CPAP Machine
As we’ve discussed, not all batteries work with every CPAP model. Some are brand-specific, while others are universal but require the right adapters and cables. Before buying, check that your machine is listed as compatible.
On the other hand, portable power stations can be a simpler solution. Because they have standard AC outlets, you can plug your CPAP in just like you would at home.
Battery Capacity and Runtime
Battery capacity is usually measured in milliamp-hours (mAh) or watt-hours (Wh). The higher the rating, the longer it can power your CPAP. Most CPAP backup batteries fall somewhere between 90Wh and 400Wh, and your actual runtime will depend on your pressure settings and whether you’re using heated tubing or humidifiers.
Here’s what real-world usage might look like, based on common machines running at lower pressure settings (with humidifiers off):
CPAP Machine | Battery Size | Approx. Runtime |
ResMed AirMini @ 8cm | 148Wh | ~20 hours |
AirSense 10 @ 10–12cm | 148Wh | ~14 hours |
ResMed AirSense 11 | 160Wh | ~30 hours |
Transcend Micro | 160Wh | ~51 hours |
As you can see, a battery in the 148–160Wh range can usually deliver one to two full nights of power. If you’re planning to go off-grid for longer or want to run additional devices, consider stepping up to a larger battery or portable power station in the 200–400Wh+ range.
Portability and Weight
If you’re frequently on the move, the battery’s size and weight become crucial. Lightweight options are ideal for travel, but they might offer shorter runtimes. Conversely, heavier batteries may provide extended power but can be cumbersome to carry. Assess your travel habits to find a balance that suits your needs.
Recharge Option and Speed
How you recharge your battery can make a big difference. Most support charging from a wall outlet, but others can be recharged via your car or even solar panels—which is a great option if you’re camping or travelling in remote areas. Plus, check how long a full recharge takes. Faster charging can be a real bonus when you’re on the move.
Airline Compliance
If you’re flying, make sure the battery meets airline regulations. In most cases, this means it needs to be under 100Wh to be allowed in carry-on luggage without prior approval. Batteries over 160 Wh are generally prohibited on passenger flights.
Is a UPS a Good Backup for Your CPAP?
If you’re looking for a backup power option to keep your CPAP machine running during blackouts, you might be wondering whether a UPS (Uninterruptible Power Supply) is a good solution. The short answer? It can be—but there are a few important things to consider before relying on one.
A standard UPS is designed to protect electronics like computers or modems, switching over to battery power almost instantly when the power goes out. This quick switchover can keep your CPAP machine running without interruption, which is handy if the power cuts out while you’re asleep.
However, there are a few catches. Most entry-level UPS units only offer limited battery life—enough for 30 to 90 minutes depending on the load. That might be fine for a quick outage, but not enough to get you through the night. And if your CPAP uses a humidifier or heated tubing, it’ll drain even faster. Plus, some CPAP machines require pure sine wave power to run properly, which not all UPS units provide—so compatibility is another thing to watch for.
That said, there are modern portable power stations with built-in UPS features, making them a more reliable and flexible option. One standout is the EcoFlow RIVER 3 Max Plus Portable Power Station. It combines the quick-switching UPS function you’d expect—with under 10 ms switchover time—with the capacity and flexibility needed for CPAP use. With 858Wh of battery storage, it can run most CPAP machines (even with humidifiers) for a few nights or more. It’s compact and lightweight, making it ideal for home, travel, or camping.
What sets the RIVER 3 Max Plus apart is its X-GaNPower technology, which extends the run time for devices under 100W—like most CPAP machines—giving you more hours on a single charge. It also features fast wall charging (0–100% in just 2.3 hours) without damaging the battery, and it’s whisper quiet at under 30 dB—perfect for overnight use.
You can charge it on the go using your car battery or pair it with EcoFlow’s solar panels for a portable solar generator setup, making it a great pick for Aussies who like to hit the road. With LiFePO₄ battery cells rated for a 10-year lifespan, the RIVER 3 Max Plus offers long-term peace of mind.
Conclusion
When it comes to sleep therapy, consistency matters—and having a CPAP battery you can count on helps make sure nothing interrupts your rest. Whether you’re prepping for storm season or planning some off-grid travel, the right battery gives you the freedom and reassurance to stick with your therapy. By choosing a compatible battery that fits your lifestyle and offers enough runtime for your needs, you’ll be set for a good night’s sleep—wherever you are.
FAQ
How long does a CPAP battery last on a single charge?
It depends on the battery’s capacity and how much power your machine uses. On average, a mid-sized battery (around 160Wh) can run most CPAP machines for one to two full nights. Smaller machines like the ResMed AirMini may last even longer. The use of a humidifier or heated tube can also significantly impact battery life, reducing it by up to 60%.
What size battery do I need for CPAP?
Most people get by with a battery between 90Wh and 160Wh for 1 or 2 overnight uses. If you’re going off-grid for longer or want to power a humidifier or heated tube, a larger battery or portable power station (200Wh–400Wh+) is a better option.
Are CPAP batteries allowed on airplanes?
Most airlines allow lithium-ion CPAP batteries up to 100 Wh in carry-on luggage without prior approval. For batteries between 101–160 Wh, you may carry up to two, but you’ll need airline approval. Batteries over 160 Wh are generally prohibited on passenger flights.