How to run a ResMed AirMini on a USB power bank

General Discussion on any topic relating to CPAP and/or Sleep Apnea.
browncamry
Posts: 5
Joined: Sat Aug 16, 2014 5:45 am

Re: How to run a ResMed AirMini on a USB power bank

Post by browncamry » Tue Mar 15, 2022 9:12 pm

phatair4me wrote:
Tue Mar 08, 2022 8:16 am
Did you ever get the Alibaba supply or is it still on the slow boat?
Hi everyone. It finally arrived! I think it got sent in a bottle.

Update: Just woke up - around 7hours at 14cm2 and according to the 4 battery indicators I’ve used around 50% of battery life. I think I’d get 2 days of use.

Update 2: I got 4.5 hours on the second day so altogether I got 11-12 hours of a single charge.

The battery pack supports a few voltages for the DC port, including the required 24V for the AirMini.

I plugged it in and it appears to work :-) I will test it overnight and report my findings. I require 15cm2 so that should be a good test.

1) the Battery:

https://m.alibaba.com/product/160024582 ... 00mah.html

What I like:
- it is sizeable but by no means huge.
- it is travel safe.
- Supports PD 60W. Charges all the things, including my MacBook Pro.
- Good build quality.
- Cheap.

2) the Cable:

The DC port fits the “Medistrom Pilot Output Cable for ResMed AirMini CPAP” cable found below. It simply fits, nothing else to plug or do.

https://m.catch.com.au/product/medistro ... p-6553595/

dsjustice wrote:
Tue Mar 08, 2022 8:14 pm
If you're considering this, be advised that a 20W power bank is insufficient. :-(

Guess I'll be upgrading to a 40W bank.
It supports 60W PD and 24V/2A. Initial tests seems positive but I need to see if it lasts the night @15cm2.
Last edited by browncamry on Thu Mar 17, 2022 5:52 pm, edited 3 times in total.

browncamry
Posts: 5
Joined: Sat Aug 16, 2014 5:45 am

Re: How to run a ResMed AirMini on a USB power bank

Post by browncamry » Tue Mar 15, 2022 9:42 pm

These guys seem to stock the same product from alibaba. For those in Australia you can get it more quickly through these guys, although you will be paying another $80aud for the convenience (or there about). There’s also a review video in their site (not a cpap review).

https://www.auspowerbanks.com.au/produc ... -24000mah/

klf88
Posts: 1
Joined: Mon May 23, 2022 1:58 pm

Re: How to run a ResMed AirMini on a USB power bank

Post by klf88 » Mon May 23, 2022 2:28 pm

Hello everyone. First post, but I've been reading the forums a decent amount since being diagnosed with OSA in January. Thanks for the great resource!

Now that I'm comfortable with therapy, I purchased an Airmini as a travel machine and will be building a battery unit to go with it. I have a 3D printer, and while I'm a relative novice with 3D CAD, I have a good friend who is a professional modeler and he has offered to assist in the creation of a custom enclosure to house everything. I will share all the CAD files and STLs here once it is complete in case anyone else is interested in printing.

The plan for the enclosure is as-follows (subject to change!):
  • We will be modeling a single enclosure that the battery bank slides into and out of. The male USB-C cable end will be captive in the back of the enclosure, and when fully seated, the battery will plug itself into this cable.
  • On top of the battery will be an enclosed space for the boost converter and cabling. This compartment will run the length of the battery
  • On top of the electronics compartment will be clips to accept the Airmini. When put together, it will be a single unit with minimal external wiring (only the Airmini power lead will protrude out of the enclosure to allow for plugging the Airmini in to power.
Here's a list of the parts I've purchased for the project:
It's unfortunate that Amazon no longer sells Ravpower battery banks. I purchased the one above for $49.99, and Ravpower lists it for $89.99 currently. That said, once I get my unit built, I don't mind modifying the battery compartment to fit the consensus "best bang-for-the-buck" battery banks (say that 5 times fast).

Looking forward to updating as we make progress, and maybe giving back to the community in a small way.

Cheers!

meagle
Posts: 1
Joined: Fri Jun 10, 2022 6:52 pm

Re: How to run a ResMed AirMini on a USB power bank

Post by meagle » Fri Jun 10, 2022 6:58 pm

So I got quick fix for the USB power bank issue without spending 499.99 here are the parts
XTPower XT-20000QC3 PowerBank=89.99
https://www.amazon.com/gp/product/B07K4 ... UTF8&psc=1
idunmed DC 24V Power Cord, 5.5 x 2.1mm Male to ResMed AirMini Plug Power Supply Cable=48.90
https://www.amazon.com/gp/product/B09P3 ... UTF8&psc=1
total cost=138.80 not bad and works all night

hiaviavi@gmail.com
Posts: 1
Joined: Sun Jun 19, 2022 4:04 pm

Re: How to run a ResMed AirMini on a USB power bank

Post by hiaviavi@gmail.com » Sun Jun 19, 2022 4:08 pm

I don't have much background in electrical engineering - so kindly educate me

1. Would this work?

Amazon 88.8Wh|65Watts Portable Laptop Charger with AC Outlet, A Super Travel Portable Battery Pack & Power Bank for HP, Notebooks, MacBook, Laptops

It has AC output and it would allow one to use their ResMed device using its original accessories and without needing a "Pilot Output Cable".

2. If yes, how many hours can one expect from this power bank?

Here is my very uneducated guestimation - kindly correct me
- Looks like the linked battery is rated at 88.8Wh with its AC outlet rated at 110V 65W AC and the ResMed device's default power brick is rated 20W AC Adapter with input range of 110-240 V and 05 - 0.3 A, so the power bank should be able to support it.
- As per the description on Amazon page, the expectation of inverter efficiency seems to be 85% => so the Working time = 88.8Wh* 0.85 / 20 W (operating power of your device) = 3.774 hours. If this is right - then this battery plan wont really work :(

Can anyone confirm if my calculations are right?