Never Stop Therapy: Essential CPAP Battery Guide for Travel (2025 Update)

This post was updated with the latest information in November 2025.

If you rely on your CPAP machine every night, traveling without a backup power source is a serious risk. Whether you’re heading overseas, camping off-grid, or simply concerned about an unexpected power outage in a hotel, a CPAP battery is a non-negotiable accessory.

Here is everything you need to know about powering your CPAP machine safely and effectively while on the move.

A CPAP battery serves two critical purposes:

• Remote Travel: Provides power for camping, RV trips, boating, or staying in locations without reliable AC power.

• Backup Power: Acts as an uninterruptible power supply (UPS) for hotels, cruise ships, or at-home use, ensuring your therapy continues automatically if wall power is lost.

Traveling with medical equipment requires specific knowledge, especially regarding lithium-ion batteries.

CPAP Machine (The Device)

• CPAP machines are classified as medical devices by the FAA and TSA.

• They do not count as one of your carry-on bags or personal items.

• We strongly recommend keeping your CPAP machine with you as a carry-on at all times.

CPAP Battery (The Power Source)

• Batteries MUST be carried in your carry-on luggage. They are prohibited in checked bags due to fire risk.

• Watt-Hour (Wh) Limit: Most airlines follow FAA guidelines. You are allowed to carry:

  • An unlimited number of batteries under 100 Wh.

  • Up to two (2) larger spare batteries ranging from 101 Wh to 160 Wh.

• Check the Label: The Watt-hour rating is usually clearly marked on the battery. If not, you can calculate it: (Volts x Amp Hours) / 1000 = Watt Hours.

When traveling, you should take certain things into account including how long you will be gone, how you are traveling and where you are traveling. If traveling overseas, most CPAP’s will work as long as you have a plug adapter or are using travel CPAP batteries. Most lithium-ion batteries are approved by the FAA for in-flight use, but you may want to contact your airline prior to flying to confirm.

Batteries are also useful in case the power unexpectedly goes out, or the campsite generator stops working. Most machines will automatically switch to battery power if AC power is suddenly interrupted. This way, CPAP therapy continues. Once AC power is restored, the device will switch back, conserving your battery's life.

Your choice of battery depends on your machine type, required run time, and destination. We categorize batteries into two main types:

These batteries are designed specifically for CPAP machines and connect directly via a DC cable (eliminating the power brick). This is the most efficient connection.

These larger, multi-purpose units provide a standard wall outlet (AC) which allows you to simply plug in your CPAP machine's regular power supply. They offer significantly longer run times.

Before you head out, make sure you have:

• The Battery and Correct Adapter Cable: Ensure you have the specific DC adapter cable for your CPAP machine model.

• International Plug Adapter: If traveling overseas, you’ll need the correct plug adapter (even with a battery, for recharging).

• Prescription: Always carry a copy of your CPAP prescription.

• Customs/TSA Letter: A physician’s note explaining that your CPAP is essential medical equipment can expedite security checks.

If you are still unsure which battery fits your travel style and machine, contact our knowledgeable customer care team. Call us at 866-414-9700 or browse our full selection of CPAP Batteries and Power Solutions.

Want to learn more about more than just batteries, including more infortmation about travel CPAP therapy? Check out this comprehensive guide that includes everything you need to know about traveling with CPAP therapy.