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Travel · Lightweight

ES400 AIR CPAP Battery

4.4864 reviews

148Wh in a 2 lb battery: a night or two on most CPAPs, light enough to pack.

$161.99Regular price $179.99Save $18.00
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Free U.S. shipping · Ships from U.S. stock in 1 business day · 30-day returns · 5-year warranty when you buy here ·

148WhCapacity
About 1–2 nightsRuntime
2.05 lbWeight

*Nights at 8.4W: an AirSense 10 at 6 cmH2O, humidifier and heated tube off, 8 hours a night. Higher pressure means fewer nights.

Four DC cables in the box cover the ResMed S9, AirSense 10 and 11, AirCurve 10 and 11, AirMini, and Philips DreamStation 1 and 2. Set the DC output to your machine's voltage and plug in. Luna G3, Transcend Micro or Prisma? Add the matching cable: ESG3, ESMC or ESPR. Check my machine

Questions before you buy? Email support@easylonger.com. We usually reply within 12 hours.

EASYLONGER ES400 AIR transparent product main image

A closer look at the ES400 AIR

Sleep off the grid.

Run your CPAP in a tent, cabin or RV.

Four CPAP cables in the box.

Find your machine in the compatibility guide to see which cable and voltage to use.

Runs your CPAP while it charges.

Keep it plugged in by the bed. If the grid drops, your CPAP keeps running on battery.

Recharge from the sun.

Pair it with the ESP110 110W solar panel, sold separately.

Recharge in your vehicle.

Two ways to top up on the road.

ES400 AIR

A night or two between charges.

ES400 AIR CPAP battery
148Wh

Capacity

30W

USB-C

2.05lb

Weight

Made for CPAP nights.

  1. 148Wh covers most CPAPs for a night, and travel machines for longer. The humidifier and heated tube use the most power, so switch them off when you need every hour.

  2. ES400 AIR is 148Wh. Batteries between 100Wh and 160Wh need your airline's approval and must go in your carry-on. Ask when you book.

  3. Four DC cables in the box cover the ResMed S9, AirSense 10 and 11, AirCurve 10 and 11, AirMini, and Philips DreamStation 1 and 2. Set the DC output to your machine's voltage and plug in.

  4. A 160W 12V car socket, 30W USB-C and 18W USB-A.

ES400 AIR CPAP batteryES400 AIR CPAP batteryES400 AIR CPAP batteryES400 AIR CPAP battery
ES400 AIR CPAP battery

A night or two between charges.*

148Wh covers most CPAPs for a night, and travel machines for longer. The humidifier and heated tube use the most power, so switch them off when you need every hour.

ES400 AIR CPAP battery

Flying takes one extra step.

ES400 AIR is 148Wh. Batteries between 100Wh and 160Wh need your airline's approval and must go in your carry-on. Ask when you book.

ES400 AIR CPAP battery

Plugs straight into your CPAP.

Four DC cables in the box cover the ResMed S9, AirSense 10 and 11, AirCurve 10 and 11, AirMini, and Philips DreamStation 1 and 2. Set the DC output to your machine's voltage and plug in.

ES400 AIR CPAP battery

Runs more than the CPAP.

A 160W 12V car socket, 30W USB-C and 18W USB-A.

Plugs straight into your CPAP.

Four DC cables in the box cover the ResMed S9, AirSense 10 and 11, AirCurve 10 and 11, AirMini, and Philips DreamStation 1 and 2. Set the DC output to your machine's voltage and plug in.

Luna G3, Transcend Micro or Prisma? Add the matching cable: ESG3, ESMC or ESPR.

  • DC cable for ResMed S9
  • DC cable for AirSense 10 / AirCurve 10
  • DC cable for AirMini / AirSense 11 / AirCurve 11
  • DC cable for Philips DreamStation / DreamStation 2
See all 25 supported machines

Pick your CPAP to see the cable and the voltage setting.

Three ways to recharge.

Wall

about 4–5 hours

The included AC adapter charges it in about 4–5 hours.

Car

about 3–4 hours

About 3–4 hours from a car socket, with a car charging cable sold separately.

Solar

about 3–4 hours

About 3–4 hours with an 80W panel. The ESP110 110W panel works too.

Compare ES400 AIR with other batteries.

Compare all models
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ES400 AIR CPAP battery

ES400 AIR

Light enough to pack, enough for a night or two.

$161.99

  • 148Wh
  • About 1–2 nights
  • 2.05 lb
  • No wireless charging
  • Airline approval required (100–160Wh), carry-on only
ES270 CPAP battery

ES270

For flights and one-night trips.

$139.99

  • 99.9Wh
  • About 1 night
  • 1.3 lb
  • 10W wireless
  • Carry-on (under 100Wh)
ES720 PRO CPAP battery

ES720 PRO

Two to three nights at half the weight.

$249.99

  • 276.48Wh
  • About 2–3 nights
  • 3.35 lb
  • 15W wireless
  • Not allowed on passenger aircraft (over 160Wh)

Specifications

Battery

Capacity
148Wh
Cells
Lithium-ion
Pass-through charging
Yes

Outputs

DC output
12V / 16.5V / 20V / 24V (earlier units label 16.5V and 20V as 16V and 19V)
12V car socket
160W
USB-C
30W
USB-A
18W
Wireless charging
None

Charging

Wall charge time
About 4–5 hours
Car charge time
about 3–4 hours
80W solar charge time
About 3–4 hours

Size & weight

Size
7.28 × 4.76 × 1.57 in
Weight
2.05 lb

Travel

Flights
Airline approval required (100–160Wh), carry-on only

Protection

BMS
Overcharge, over-discharge, overcurrent and short-circuit
  • 5 stars: 49 (77%)
  • 4 stars: 6 (9%)
  • 3 stars: 3 (5%)
  • 2 stars: 3 (5%)
  • 1 star: 3 (5%)
J
JH
Very impressed after first trip!

I was super annoyed at needing to purchase a battery for my "stupid CPap" for camping. They're so expensive! I settled on this one, the Easylonger ES400 AIR, as it was the cheapest and definitely compatible. I charged it prior to leaving. I have an Airsense 11 and do not use humidity or heat. I used it for nearly 14 hours over 2 nights on a camping trip and the battery still registered as full! It comes with all sorts of cords. I connected with 24 V DC power. It is taking a little charge now, but it's incredible to me that after 2 full nights it's still pretty full. Supposedly you can charge other things or use solar power with an additional attachment. I haven't tried that yet. Super impressed at this battery pack and grateful for the much cheaper price, compared to other brands.

A
Armando Hilel
Great backup for CPAP – no more waking up during power outages

Very easy to use. It came with around 75% battery and charged to 100% in less than one hour.
I use it with my AirSense 11 CPAP. I changed the settings to Tube Temp OFF and Humidity Level 1.
It worked all night (about 7 hours), and in the morning the battery still showed 100%.
Best part: no more waking up because of power outages during the night.

C
CJ
Powerful Battery Backup

Portable power is the norm today with every electrical gadget needed to be recharged. The EASYLONGER ES400 is for CPAP machines like my RESMED Airsense 11. Contains multiple power cords to power up almost all CPAP brands. It works for about 8 hours with a humidifier. Very solid build charger and it is not limited to CPAP use. This can be used to charge other devices or to power up a laptop, etc. I'm a bit confused with the different voltage from 12v to 24v. I'm not sure why they still use the cigarette lighter plug for recharging, a USB type C or similar is more of the standard now. I would recommend this for the smaller portable machines to get longer use for your CPAP time. This battery pack will also be useful for camping or traveling when you need back up portable power. This is a very portable, high quality, and powerful battery.

M
Marisa
Powerful, Versatile Portable Power — Excellent Value

I just received this portable power unit and it’s been very easy to use right out of the box. It provides a strong, reliable power output, and I really like that you can select multiple DC output voltages (12V, 16V, 19V, and 24V), which makes it compatible with a wide range of CPAP machines such as the AirSense 10 and AirSense 11. It also includes USB outputs, which I use to charge my phone and other small electronics with no issues.

In addition to the DC outputs, this unit supports connecting a small power inverter, allowing you to run or charge additional devices when needed. The portable power unit has a rugged, military-style design and comes with a quality carrying case, extra cables, and clear instructions. Considering all the features and versatility, this is an excellent value for the money. Customer support has also been excellent and very responsive. Overall, a well-designed, reliable, and versatile power solution that I highly recommend.

L
LAC
Works great with my Airsense 11

This battery is compact, and includes a nice soft travel case. I have used this several times and it runs my Airsense 11 all night without using the humidifier. My only wish is that it could be used as an uninterruptible power supply whereby I could leave it continuously plugged into the wall and the CPAP would seamlessly transfer to battery power in the event of an outage, without having to purchase additional items. I did email the company asking for some additional information, however, I have not heard back. The digital display is easy to view and the unit provides multiple voltages including the 24V that I need for my machine. It has different cables that can be used for different machines.

I would think of this battery as something to use while traveling on the road, boondocking without electricity or for an emergency backup during a power outage. This also makes a great gift as it looks impressive. I have several Easylonger products and so far have been very satisfied with the performance and durability. All in all, so far this battery is worthy of five stars.

P
Pumpkin
plenty of power

this is going to be used in a camping situation it has the USB-A to USB cable, it has a USB-C to USB-C it also Includes 4 cables, pass-through charging via AC/car/solar, plus USB ports. Super safe with BMS protection. Grab it for camping or power outages cam take it anywhere! its easy to use and its small for its power output and it feels very durable

J
Jeff
Nice Battery

This battery will run my Resmed mini CPAP machine for three nights. I’m very happy with the performance. It’s a bit bulky but not too bad for me. No problem with airline carrier

T
TGalvan
Last a good long time on one charge!

So far so good…we have only used 1 night and it worked great. Did not even use a whole bar! I believe it will work out well for us! Stay tuned…

K
KEG
Works great

Worked as advertised.

j
jenelleaha@gmail.com

EASYLONGER ES400 AIR CPAP Battery Backup — 148Wh Lithium-ion

T
Timothy Scott
Essential for cpap users

I got this case of power outages, thankfully non yet but I did try it out and lasted through the night with no problem. Especially like because it is made specifically for cpap machine and has many ends to fit your machine. I would tell people to purchase this Especially if you depend on cpap for quality of life.

B
Billb
Great power for CPAP backup.

I was about to return it because I realized after it arrived that it did not come with the ability to be plugged in and use as a power supply at the same time. But I realized that I'm not without power that often so I just need a backup option which this does very well.

D
Diana
Very good product

Got it for my husband. It lasts for hours. Great for camping and long trips.

L
LuWanda Todd
Good sleep

Good for sleeping thru power outages.

R
Robby
Great Reliability for CPAP Use

I needed a power pack to use on a tent safari in Africa. This unit worked perfectly in powering my CPAP for a full 2+ nights on each full charge. It was convenient to use and not very heavy for packing through airports and on safari. While some other travelers had power pack failures during use with CPAP machines, this unit worked great over my 3 week trip!

M
Mike A
Charger Gets Hot

The battery life was good for me as it lasted 1.5 nights with the humidifier and hose heater turned off. The issue is that the charger gets extremely hot when charging. Their Support says the Charger is ok if it reaches 122 to 140 degrees. Seems a little hot to me. Finally, it doesn't have the TSA information on the unit itself. It is in the instructions so must bring that along when getting approval at the airport. I have dealt with airline approval before and the agent only looks for the "TSA" tag.

E
Edward Clark
Battery Life..ummm

It was okay. Built beefy but it didn’t last as long as I thought it would have.. I maybe got 5-6 hours before it died..

A
Antonio R. Silva
Peace of mind

Has came in handy through power outage and camping always keep it ready to go just in case

J
J. Dawson
CPAP Battery

Worked very well, easy to set up and use.

M
MatthewGordon
Pos battery

I had a problem , customer service sent me an additional replacement no questions asked it works better than they say I get to 7 hour night sleep and a couple hour nap out of one battery
A great product I highly recommend it five stars

R
Rand wischmann
Works ok.

Works ok, but battery will not last 8 hours with the water/hose heating on.

J
Jaided Dreamah
A Must Have for Cpap users and also charges other items.

Hallelujah!!! This battery and kit are perfection! Works perfectly with Airsense 10 as well as Airsense 11. I love that it includes multiple adapter connections for other machines. I purchased this to use with my old Airsense 10 which has become my “travel” cpap because I now use Airsense 11.

We had a blackout in the middle of the night that woke me and since this had an Airsense 11 adapter I quickly hooked it up and went on to sleep 5 hours on the battery and when I woke up, the battery only went down 1 bar. So I’m pretty sure you can get many, many more hours in on one charge.

If you have a Cpap this unit is a must have, cuz you never know. It can also be used to charge devices like your phone etc.

T
TD
Perfect for camping

I bought this to use while camping so my son could use his CPAP since we didn’t have hookups for 2 nights. We shut off the humidifier/heated tubing as others recommended and we got 2 full nights out of it. The battery didn’t get hot at all. I would highly recommend this! It’s a life saver!

A
A. Luoma
Would recommend for air travel, camping or at home back up

I bought this battery for use on a long haul flight to Asia. It worked so well. I slept TEN hours on the way there out of a 15 hour flight. Battery barley ran down at all, tons of life left. Since I was gone 2 weeks, I did charge it bit before coming home, but I think it would have easily lasted. Great value for the price considering the one I was going to buy at the med supply store was over $400. Easy to use. Not the lightest piece of equipment but well worth it to run my CPAP. And it met the requirement for air travel--that was something that I paid great attention to when shopping for this battery!

J
James Day
Multi Tasker for CPAP and Star Link

Bought it for emergency CPAP backup, charged it, put it away. Then I used it; worked great only used about 25% for one night on my ResMed 11. Charged pretty fast. Then I got the idea to plug my Star link into it. Worked instantly and flawlessly. WOW worked great and multi tasker! Very happy now that I used it.

It's 148Wh, so you need your airline's approval, and it must stay in your carry-on.

About one to two nights with the humidifier and heated tube off. A travel machine lasts longer, and a home machine at high pressure lasts less.

Yes, with the ESG3 cable, sold separately. The heated tube isn't supported on battery power.

Yes. The EAS10 and EAS11 cables plug into the 12V car socket and give you 8.5 ft of reach.

Yes. Pass-through charging powers your CPAP while the battery charges.

Five years on batteries ordered from easylonger.com. Bought from another seller? You get three years, and registering with us extends it to five.

Not sure it fits your machine?

Tell us your CPAP and we'll show the cable and voltage.

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