It’s Easy to Connect a CPAP Battery to Your CPAP Machine
Follow our YouTube video
We recently posted a video that shows how to connect batteries to CPAP machines. Battery power is critical to people in CPAP therapy in times when power is not available, and having CPAP battery packs could be crucial in emergencies or just to travel.
What happens to a dedicated and compliant CPAP user when the power goes out? How about traveling or camping and not being able to rely on standard electrical power? The CPAP shop supplies both Respironics and ResMed portable stand-alone batteries and equipment to help users in these non-traditional situations. This video is an overview of how to connect both Respironics and ResMed portable CPAP Batteries & DC cables to any CPAP machine.
In this video we show the equipment needed to connect the battery to the CPAP machine and how to connect them. Chris also shows how to connect each piece, how they work together, and how easy it is for anyone!
Equipment Needed In case of a Power Outage
Chris discusses all of the items needed to connect your CPAP machine to a CPAP battery. Here are some examples:
- Stand Alone Battery
- Deep Cycle Marine Battery (best)
- Car Battery
- Lithium CPAP BatteryDC Battery adapter
- Shielded DC cord for your specific CPAP machine
- Cord is usually around 70 inches longInverter (Older Models only)
- To maximize your CPAP battery’s life turn the heated humidifier temperature off.
CPAP battery packs are also important when traveling and camping or when engaging in any other activity where you might be away from a power source overnight.
All the lithium battery packs come in a soft case with a recharger, connecter cable, and adapters that will allow the batteries to be hooked up to various machines.
Some of the machines have special converters that must be used when hooking up to CPAP battery packs. All of the batteries have cable lengths of approximately six feet, so when using battery power you don’t have to be right next to the power source.
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.
To learn about battery specs and more, you can watch the video here. Additionally, if you have any questions about which is an appropriate battery for your CPAP machine, please call us at (866) 414-9700, or contact us through our website.
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.
This post was updated with the latest information in January 2026.
Whether you are prepping for a summer camping trip under the stars or bracing for winter storm power outages, your CPAP therapy shouldn't have to stop just because the grid does. In 2026, CPAP batteries have evolved from heavy, lead-acid "bricks" into sleek, lithium-ion powerhouses that are easier to connect than your smartphone.
If the thought of cables and converters feels overwhelming, don't worry. Here is the 2026 simplified guide to connecting your CPAP to a portable battery.
Choose Your Connection: AC vs. DC
There are two ways to get power from a battery to your machine. Understanding the difference is the key to making your battery last all weekend.
The AC Method (Standard Plug)
You plug your machine’s "wall brick" directly into a battery’s AC outlet (like on a Portable Outlet UPS). This is the easiest method but the least efficient because energy is lost during the conversion from DC to AC and back to DC.
The DC Method (Direct Connection)
You use a specific DC cable (like those for the Medistrom Pilot-24 Lite or Freedom V2) to plug the battery directly into the machine.
- 2026 Advantage: DC-to-DC connections are up to 30% more efficient, often giving you an extra night of sleep on a single charge.
Battery and Machine Compatibility
Machines and batteries can sometimes vary in compatibility. For example:
-
Resmed AirSense 11 & AirMini: These require 24V power. Using a standard 12V car battery without a proper 24V converter will fail to power the device.
-
React Health Luna: These typically operate on 12V.
Always ensure your battery kit includes the specific "Smart Cable" for your model. In 2026, most kits—like the Freedom CPAP Battery 160—come with interchangeable tips to fit almost any modern machine.
The Proper Setup for Success
If you are using your battery as a backup for power outages, you want to set it up in UPS (Uninterruptible Power Supply) Mode.
-
Plug the battery into the wall outlet.
-
Plug your CPAP machine into the battery.
-
The battery stays charged while passing power through to your machine. If the power goes out at 3 AM, the battery kicks in instantly without you even waking up.
Maximizing Your Runtime
A common 2026 question is: "Why did my battery only last 4 hours?" The answer is almost always Heat.
-
Turn Off the Humidifier: Heating water is the biggest culprit to losing power fast. Turning your humidifier off (or to Level 0) can double or even triple your battery life.
-
Turn Off Heated Tubing: Like the humidifier, heated tubes drain batteries rapidly. Use a standard, non-heated tube when running on battery power.
Where to Buy the Best CPAP Machines and Batteries
The CPAP Shop has been a trusted retailer of all things CPAP since 2004. WIth thousands of the best products in stock, excellent customer service, and an easy online shopping experience, The CPAP Shop is your go-to place for all of your CPAP needs.
If you are looking to learn more about CPAP batteries, machines, or any other products we offer, give our expert staff a call at 866-414-9700.
-
-
-
-
-
-
Medistrom Pilot-12 Lite CPAP Battery Backup Power Supply (for Respironics)As low as $339.00 Regular Price $395.00
