I use the EASYLONGER CPAP Battery Backup Power Supply ES720 as a 266.4Wh portable power option that keeps CPAP therapy running during camping, off-grid travel, and home power outages; real-world runtime varies a lot because pressure settings matter, and heated humidity or heated tubing can cut runtime fast. I also keep in mind that its 266.4Wh capacity usually exceeds airline carry-on battery limits.

Key takeaways

Capacity & travel: The 266.4Wh capacity works well for CPAP backup in emergencies and outdoor camping, but it often exceeds common airline battery limits.
Compatibility: Broad compatibility covers ResMed S9/AirSense/AirCurve/AirMini lines plus Philips DreamStation and DreamStation 2; I also note a heated-tube limitation on Luna G3.
Runtime variability: Runtime ranges from multiple nights with conservative settings to roughly a single night when I enable humidity or heat.
Efficiency best practices: I get the best efficiency by using the included DC cables and matching the ES720’s adjustable DC voltage to my CPAP’s requirements; I avoid AC inverters and converter chains that waste power.
Extra utility: It also works as a small power hub: I can run USB devices, use the 180W car-style socket, and charge through while powering gear. I also rely on BMS protections and the built-in LED/SOS light, with recharging via AC, USB-C, solar, or car.

Overview and Compatibility

The EASYLONGER ES720 packs 266.4Wh for CPAP backup during camping, power outages, and off-grid trips. It is FSA or HSA eligible. Users rate it 4.4 stars from 252 reviews.

Device fit and key notes

I use this checklist to confirm fit before I pack it:

ResMed: S9, AirSense 10, AirCurve 10, AirMini, AirSense 11, AirCurve 11
Philips: DreamStation, DreamStation 2
Luna: G3 supported
Heated tube: not supported on Luna G3

For smaller fast-charge packs, I compare options like the EcoFlow Rapid Pro.

Check current pricing and availability at Amazon here!

EASYLONGER CPAP Battery Backup Power Supply ES720, 266.4Wh(Exceeds Airline Limit) for AirSense 11, AirSense 10, AirCurve 10, AirMini, Philips Dreamstation/ 2, Emergency Battery for Outdoor Camping

This image is property of Amazon.com.

Runtime Expectations (Real-World Feedback)

Runtime feedback is strong overall, but it can swing a lot depending on how the machine is used. Many users report solid results with the ResMed AirSense 10, and some even claim up to 4 nights on a charge when settings stay conservative. Once comfort features are turned on, endurance drops quickly. One customer reported about 8 hours of operation with humidity enabled, which aligns with expectations for a higher-draw setup.

What drives the differences night to night

A few setup details explain why one person gets 2 full nights while another feels it doesn’t last long enough. These variables tend to matter first:

Pressure settings: higher pressures usually pull more energy.
Mask leak: leaks make the machine work harder and burn battery faster.
Heated humidity and heated tube use: these can cut runtime sharply.
Ambient temperature: cold nights can reduce usable capacity.

If the goal is the longest runtime, disabling heat, reducing humidity, and fixing leaks before buying extra capacity is usually the best approach. For backup power options, comparisons often include units like the Anker PowerCore Reserve, the EcoFlow RIVER 2, or a rugged pick like the NESTOUT IP67 power bank.

Check current pricing and availability at Amazon here!

Setup and Included Cables (Important Connection Tip)

Setup stays simple because the box includes the right DC cables and a clear path to avoid extra converters. I get 4 dedicated DC cables for ResMed S9, AirSense 10/AirCurve 10, AirMini/AirSense 11, and Philips DreamStation, plus an AC adapter, USB C-C cable, USB A-C cable, a storage bag, and a manual.

Connection tip I follow every trip

I use these steps to keep the setup clean and efficient:

I plug the CPAP into the battery pack’s DC port, then set output voltage to match the machine (12V / 16.5V / 20V / 24V).
I avoid the cigarette lighter port unless I’m using a voltage converter and I match CPAP operating voltage.
I pack a backup bank like the Anker Prime power bank or EcoFlow River 2.

Check current pricing and availability at Amazon here!

Travel Power Hub Features and Safety

I treat the ES720 as a compact travel power hub, not a single-purpose CPAP battery. The output mix gives me flexibility for mixed gear loads, from low-draw USB gadgets to higher-draw DC devices. I also like having pass-through charging, since it lets me top the pack up while still running essentials.

Outputs, use cases, and protection

Here’s how I put each feature to work and what it means for safety:

180W cigarette lighter socket: I use it for car-style accessories and other 12V gear, especially when I don’t want extra adapters.
Adjustable DC output: I match voltage to the device so I don’t waste power or risk unstable operation on sensitive electronics.
4 USB ports: I charge phones, tablets, cameras, handhelds like Steam Deck, and consoles like Nintendo Switch while keeping DC free for bigger loads.
BMS safety system: Over-charge, over-discharge, over-current, and short-circuit protection help reduce failure risk when I’m charging overnight or running multiple devices.
Pass-through charging: I run devices while charging the battery, but I keep airflow and heat in mind and avoid maxing every port at once.

If I need alternatives for different trip styles, I compare options like the Anker Prime 300W, EcoFlow Rapid Pro, PowerCore Reserve, EcoFlow River 2, NESTOUT IP67, or a heated-gear option like this Riafox pack.

Check current pricing and availability at Amazon here!

Recharging Options and Built-In Emergency Light

I like gear that charges from almost anything, and this battery fits that mindset. I can top it off at home, in a vehicle, or off-grid, then keep it ready for CPAP use, camping loads, or backup power.

How I recharge it in real life

I usually pick the fastest option available, then keep a secondary method as a fallback. Here are the supported methods and typical charge times:

72W AC adapter: 4–5 hours
USB-C PD charger (60W max): 4.5–5.5 hours
100W solar panel on a sunny day: 4–5 hours
Car outlet with an 18–24V converter: 4.5–5.5 hours

For quick trips, I pair compact wall charging with something like the EcoFlow River 2 fast-charge option. For pure USB-C flexibility, I keep high-output banks in mind like the Anker Prime 300W bank or EcoFlow Rapid Pro 300W. In wet or dusty kits, I prefer rugged units like the NESTOUT IP67 power bank. For long runtimes, I look at the Anker PowerCore Reserve 60000mAh, and for heated gear I’ll stash a heated clothing battery pack separately.

The built-in LED light saves space in my pack. I can switch between white strong and weak modes, then flip to a red SOS mode when visibility and signaling matter.

Check current pricing and availability at Amazon here!

Portability and Size

The ES720 measures 9.1 x 5.9 x 1.7 inches and weighs 3.31 lb. That size makes it easy to pack in a carry-on, car trunk, or bedside kit, but it won’t disappear into a jacket pocket. I treat it like a compact medical accessory, not a phone power bank.

How I judge “portable” for this class

Some customers call it “very light”, while others label it “super heavy”. Both reactions make sense because 3.31 lb feels different depending on the trip. I use these rules to decide if it fits my loadout:

Travel: I pack it in a small sling or backpack, then keep cables and adapters in the same pouch.
Preparedness: I store it with my CPAP parts so I don’t waste time hunting for the right lead.
Day carry: I skip it and use smaller banks like the Nestout rugged power bank.

Size comparisons that help set expectations

If I want a higher-power travel brick, I look at the Anker Prime 300W or the EcoFlow Rapid Pro. For big-capacity emergency charging, the Anker PowerCore Reserve sets the scale, while a compact station like the EcoFlow River 2 shifts into “carry case” territory.

Check current pricing and availability at Amazon here!

Disclosure: As an Amazon Associate, I earn from qualifying purchases.

Some of the links in this article are "affiliate links", a link with a special tracking code. This means if you click on an affiliate link and purchase the item, we will receive an affiliate commission.The item's price is the same whether or not there is an affiliate link. Regardless, we only recommend products or services we believe will add value to our readers.By using our affiliate links, you help support our Website, and we genuinely appreciate it.

Kevin O’Donnell

From San Jose, California. Former IT support lead who has seen unspeakable things plugged into USB ports. Reviews electronics with zero patience for bad firmware.