Best CPAP Batteries of 2026

Continuous positive airway pressure (CPAP) machines are the most common treatment for sleep apnea. Virtually all CPAP machines use a power supply that plugs into an electrical outlet. For this reason, most CPAP machines do not require batteries.

However, sometimes sleepers may need or want to power their CPAP machines by battery. For example, some sleepers may require a battery while camping or traveling to places that don’t have readily available American electrical outlets. A battery can also serve as a backup power source in the event of a power outage.

Choosing the right CPAP battery is an important purchase decision. Batteries capable of powering CPAP machines are not cheap, so you want to invest in one that is long-lasting and compatible with your specific CPAP machine.

Learn More About the Best CPAP Batteries

Best Overall

Medistrom Pilot-24 Lite Battery and Backup Power Supply

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Price: $339

Dimensions: 3.5 x 6.7 x .78 inches

Charging Capability: 24V

Recharge Time: 2 to 9 hours, depending on adapter

Full Breakdown

The Medistrom Pilot-24 Lite CPAP Battery Backup Power Supply has a lightweight design that makes it a superior choice for home or on-the-go use. If you’ll be without power for hours at a time, this battery has got you covered.

What Does It Do?

The battery weighs 1.3 pounds, which is lighter than many competing battery models, and it measures 3.5 inches by 6.7 inches with a .78-inch thickness. The average charge lasts anywhere between 8 to 16 hours, depending on your machine settings and accessory use. Lower pressure settings result in longer charges, while accessories such as humidifiers and heated tubes will reduce the amount of usage time before you’ll need to recharge the battery.

Who Is It Best for?

The slender and lightweight design make the Medistrom Pilot-24 ideal for air travel, road trips, or vacations where you will be away from power outlets for long stretches of time. The battery is FAA-approved for use on flights. You can use the battery’s USB port to charge devices such as phones and tablets. An LED flashlight is built into the battery, in case you need a light source during a power outage. The battery is compatible with a number of CPAP units.

Shipping is free to the contiguous U.S. for purchases $99 and over, and you may return the battery in unused condition for up to 30 days after the ship date. You’ll receive a refund minus any shipping fees as well as a 15% restocking fee.

Best Battery for Transcend Users

Transcend Portable Batteries from Somnetics

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Price: 350

Dimensions: 4.8 x 5.2 inches

Charging Capability: 71Wh

Recharge Time: Less than 4 hours

Full Breakdown

While many portable CPAP batteries are designed with smaller dimensions, the Transcend Portable Batteries from Somnetics have an especially thin profile. If you own a Transcend CPAP machine and need a portable power source that’s easy to stow, this model is an attractive option.

What Does It Do?

This compact battery from Somnetics comes in a P4 and P8 option. The P4 will power your machine for approximately 7 to 9 hours before needing to be charged, while the P8 provides up to 14 to 16 hours of power. Keep in mind that the running time will vary depending on factors such as respiratory rate and altitude. You can recharge the battery with AC or DC power cords, as well as solar power.

Who Is It Best for?

The battery’s small profile makes it perfect for Transcend users who travel frequently. Measuring 4 inches by 3 inches, the battery fits into the palm of your hand. The P4 weighs .6 pounds and the P8 weighs 1.1 pounds, so it won’t weigh down your luggage or take up too much space. If you anticipate needing a battery for extended stretches of time, you can choose the P8 for a longer running time.

Shipping is free within the contiguous U.S., and you can return the battery in unused condition within 30 days. You will receive a full refund minus shipping costs and a 15% restocking fee.

Best Battery for Philips Users

Philips Respironics Travel Battery Kit

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Price: 449

Dimensions: 1.25 x 5.25 x 9 inches

Charging Capability: 90Wh

Recharge Time: 3 to 4 hours

Full Breakdown

The Philips Respironics Travel Battery Kit is a lightweight travel battery that also works as an uninterruptible power supply (UPS). It’s designed for DreamStation and DreamStation 2 devices, making it a handy backup battery for Philips users at home and on the road.

What Does It Do?

On a full charge, the battery can power your CPAP for up to 14 hours. Your actual runtime will vary with your pressure settings and whether you use accessories like a heated humidifier.

LED indicators show how much charge is left, so you can tell at a glance whether it’s ready for the night. Because it also works as a UPS, it switches on automatically if your power goes out, and your therapy will keep going without interruption.

Who Is It Best for?

This kit is a good fit if you use a Philips Respironics DreamStation or DreamStation 2 and want a backup for your machine. It’s FAA-approved, which makes it convenient for frequent flyers, and it’s also useful if you live somewhere with frequent power outages. Keep in mind that it only works with DreamStation devices, so it won’t help if you switch to another brand later.

It ships free in the contiguous U.S. on orders of $50 or more. Because of carrier restrictions on batteries, this product ships by standard ground only. It comes with a 6-month warranty, and you can pay with your HSA or FSA.

Comparison Chart

How to Choose a CPAP Battery

Unless you’ve purchased a CPAP battery before, you likely feel uncertain about how to determine which battery to choose. There are a variety of CPAP-compatible batteries available on the market. Not all batteries perform equally well, however.

Knowing what to consider when purchasing a CPAP battery can help ensure you purchase the battery that will work the best for your needs and is compatible with the best CPAP machine for you.

What to Consider When Purchasing a CPAP Battery

When shopping for the best CPAP battery, consider many different factors. Most importantly, the battery you choose must be compatible with your CPAP machine. Secondly, your battery’s run time should exceed the time you spend sleeping, so your machine doesn’t lose power during the night.

Other factors vary in their importance depending on the person. For example, some sleepers are on a budget, so a lower-price battery could be important to them. Others might want to invest in a battery that’s long-lasting, so its durability and warranty could be of importance. Sleepers planning on using their battery while camping or traveling do best with a highly portable battery that charges quickly.

Be sure to consider your own unique situation and preferences when shopping for a CPAP battery. The best CPAP battery is the one that most satisfies your needs.

Machine Compatibility
Finding a battery that’s compatible with your CPAP machine is an absolute must. Not all portable batteries are compatible with all CPAP machines.

Some CPAP machine brands make their own compatible portable batteries. Be sure to research compatibility before purchasing a battery. An incompatible battery might not power your CPAP machine properly. An incompatible battery could also damage your CPAP machine.

Battery Capacity
Battery capacity is a scientific term that refers to a battery’s ability to store power. Battery capacity is usually measured in terms of milliamps per hour (mAH). Generally, batteries with a higher capacity also have a longer run time. External factors, such as temperature, can impact a battery’s capacity. Most sleepers want a battery with a higher capacity to power their CPAP machine.

Run Time
Run time refers to how long a battery can power a device. Run time is important when batteries are being used to power CPAP machines. If your battery’s run time isn’t long enough, your battery could run out of power while you’re using the CPAP machine. Most CPAP batteries provide enough power for 1 to 3 nights of sleep before they require recharging.

Some sleepers want a battery with an exceptionally long run time, so they don’t have to recharge the battery every day. Batteries with extra long run times tend to be more expensive than those with shorter run times. A long run time battery could be necessary for some sleepers camping or traveling, who can’t access a wall or car outlet every day during their travels.

Charge Time
Charge time refers to how long a battery takes to recharge. Charge time can be important, especially to people using a CPAP battery while traveling. When a person isn’t in one single place or near an outlet all day, having a battery that charges quickly is required so it can become fully charged. If a battery isn’t fully recharged during the day, its run time will be diminished, and it might not be capable of powering a CPAP machine all night long.

Portability
Portability matters to sleepers wanting a CPAP battery so they can use their CPAP machines while camping or traveling. Size, weight, and design impact the portability of a CPAP battery. Smaller batteries take up less space in a bag, which is a plus, especially when traveling in situations that limit luggage space. Lighter-weight batteries help keep bags light, which is important when camping or in other travel situations that require a person to carry their luggage for longer distances.

Durability
The more durable a battery is, the longer lifespan it will likely have. Some battery manufacturers share how long their battery is guaranteed to last in terms of how many times it may be recharged. Durability refers to more than just lifespan, however. The design and shape of a battery also factor into its durability. A durable battery won’t break easily or become damaged through regular use.

Price
People on a budget care about the price tag associated with their CPAP battery. CPAP batteries generally run between $200 and $600. Unfortunately, less expensive batteries often do not perform as well, and typically have shorter run times and longer charge times. Of course, this is a generalization and not a rule. Sleepers shouldn’t make assumptions about the quality of a battery or decide which battery to purchase based on price alone.

Warranty
Most CPAP batteries come with a 1-year manufacturer’s warranty. Generally, these 1-year warranties cover defects in the battery but not damage or problems caused by use. Sleepers seeking a CPAP battery should familiarize themselves with details of the manufacturer’s warranty before making a purchase.

CPAP Machine Battery Compatibility

Purchasing a battery that’s compatible with your CPAP machine is of utmost importance. If you purchase a battery that isn’t compatible, it could damage your machine or simply not work.

We’ll highlight popular CPAP machine models and batteries compatible with each machine type.

Inverters

Inverters allow sleepers to recharge their portable CPAP battery using a DC car outlet rather than a standard wall outlet. Since nearly all American electrical systems use AC power, CPAP batteries are recharged by AC power. Vehicle electrical outlets put out DC power, however. An inverter is required to transform DC power into usable AC power.

If you’re always able to charge your CPAP battery using a wall outlet, you don’t need an inverter. An inverter is useful to people who want to recharge their CPAP battery from within a vehicle. People bringing their CPAP machine camping or on road trips often find an inverter crucial, since they don’t have access to wall outlets on a daily basis while traveling.

When people shop for CPAP batteries for the first time, they often have questions. We’ll answer the most frequently asked questions, so you can feel confident as you shop for a battery to power your CPAP machine.

How We Test

Our CPAP reviews and recommendations are developed and approved by a team of licensed sleep care specialists, including nurse practitioners, respiratory therapists, and polysomnographic technologists from our partner, Sleep Doctor. Our evaluations use the following sources:

• Clinical experience: Our clinicians work directly with patients and collect quantitative data on which devices work best for different types of sleepers, especially those with sleep disorders like sleep apnea.
• In-lab testing: Our Seattle Test Lab is where we do all our in-person testing. We assess every product we cover on Sleep Foundation, looking at everything from features to functionality. We consider factors like ease of use, noise levels, and ease of cleaning. These tests measure how devices perform, not treatment outcomes.
• Verified patient reviews: Lastly, we make sure to incorporate thousands of real world reviews from verified Sleep Doctor patients to capture genuine experience.

Together, these sources help us recommend devices suited to each sleeper’s needs. Read our full CPAP research methodology to learn more.

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