Back up power

[Blocksom]

Do y’all have some kind of battery power for your cpap in the event of a power outage. I haven’t had to face this yet but would like to find something that’s good for when the power goes out. What do y’all have?
Also, has anyone’s power gone out while you were sleeping and did you wake up pretty quick due to lack of air flow.

[Dog Slobber]

If you're a DIYer, you can make a terrific backup system with:

• 12 volt scooter battery:
• battery box
• battery tender
• DC cable for your CPAP

Here's a YouTube tutorial for making a Battery Box suitable for CPAP.

https://www.youtube.com/watch?v=7Tf3fngKA-c

If you're not a DIYer:

• portable power station
• DC cable for your CPAP

Although these often have an AC Outlet avoid, use a DC cable instead. Using the inverter will result in a 40%ish reduction in efficiency.

Avoid using a UPS:

• very expensive
• poor capacity for price
• often doesn't have 12 volt output
• often have an alarm the can't be turned off when drawing from battery

Here's a really good battery topic:
viewtopic.php?f=1&t=114012#p1102354

[Lifeisabeach]

Do y’all have some kind of battery power for your cpap in the event of a power outage. I haven’t had to face this yet but would like to find something that’s good for when the power goes out. What do y’all have?
Also, has anyone’s power gone out while you were sleeping and did you wake up pretty quick due to lack of air flow.

Sometimes it takes me a couple minutes to wake up, or perhaps better said, I'll wake up within a few minutes of losing power and lay there groggily, and it then takes a couple minutes to realize something's not right. I'm interested myself in using a UPS that kicks in automatically if I do lose power, but I can't find anything definitive that can be used in that regard. APC is well known for their UPS systems, but they are on the record as saying theirs are inappropriate for use with medical devices. It seems to be more of a disclaimer to protect themselves against liability though.

A lot of folks use a deep cycle battery along with a DC adapter for camping and other outage uses. Dog Slobber posted a link in another thread to a great video that's worth a look.
https://www.youtube.com/watch?v=7Tf3fngKA-c
(Edit: LOL! Ninja'd by Dog Slobber himself.)

For long-term outages, I have an Anker PowerHouse 400 that will get me through about 4-5 days (with the humidifier turned off). Goal Zero makes similar ones in different capacities that work comparably, but these types are also very expensive compared to the deep cycle option. They are considerably lighter though, which for me was the overriding consideration.

Something else I keep on hand is a Ryobi 18 volt battery with an inverter they make that let's you use the battery for AC power. I like this solution because I have these batteries on hand already and can implement this very quickly if I lose power unexpectedly so I can get back to sleep with minimal fuss. Now to be VERY CLEAR, since a previous conversation about this got out of control, this is not a good long-term solution, and you do have to make sure the combo meets the power requirements of your particular machine. I see you have an AirSense, so I can confirm that it does work within specs per ResMed's own battery guides and Ryobi's specs. I get 4-5 hours or so, with the humidifier off, on a 4 Ah battery. If you have a different brand, adapters can be bought to make them work with the Ryobi inverter, but truthfully I would avoid that. If you have Milwaukee tool batteries, you can get an adapter that provides DC power off their batteries. Here's a video where someone used that to rig up a DC port with one of these that could be used with a DC adapter for your machine.
https://www.youtube.com/watch?v=GnuvRopt74g

DC is much more efficient than using an AC inverter, so ideally stick with a DC power-based solution to get the most out of your battery. Using an AC inverter will waste some of the battery power as heat.

[ChicagoGranny]

Also, has anyone’s power gone out while you were sleeping and did you wake up pretty quick due to lack of air flow.

If you are concerned, use a power-failure alarm - https://www.truevalue.com/power-failure-alarm

I use one.

[Miss Emerita]

To be sure I wake up if the power goes out, I have an alarm plugged into an outlet on the same circuit as the machine. The alarm is made by Reliance, and the alarm is about the same volume as an alarm clock. I found it on Amazon.

[jim22]

I assembled a battery box with battery terminals and a 12v cigarette lighter outlet with a couple USB outlets. Power is quite reliable here, so rather than buy an expensive, dedicated deep cycle battery and a dedicated battery tender, i figure i will harvest the battery out of my spare truck if i need to sleep and the power happens to be out. It might wreck the battery, if so, automotive batteries are easy to get and reasonably priced. They need to be replaced every 5 or 6 years anyway. I have not had to try it yet. Cost was minimal, parts came off the shelf at the local walmart.
Jim