Hope2SleepGuide

Sleep Apnoea Forum Bringing Help + Support to the Patient

Hi, wonder if anyone can help me, I am looking for a DC power lead without the car lighter attachment for my Philips REMstar Auto A-Flex. I'm currently using an inverter and a leisure battery when caravanning and not hooked up to mains electricity. The inverter is exceedingly noisy but is worth it for a good nights sleep but it does drain the battery quite quickly.

Views: 180

Reply to This

Replies to This Discussion

If you are good with a soldering iron you could make one.

Or you could buy one with a car lighter plug and get and car lighter extension lead, these normally have crocodile clips on the end.  Just be careful with the polarity on both leads.

Trace the wires out with a multi-meter, or get someone to check it for you.

Do not mix the connections up when you connect it to a battery.



Sleep2snore said:

If you are good with a soldering iron you could make one.

Or you could buy one with a car lighter plug and get and car lighter extension lead, these normally have crocodile clips on the end.  Just be careful with the polarity on both leads.

Trace the wires out with a multi-meter, or get someone to check it for you.

Do not mix the connections up when you connect it to a battery.

I'm not to bad with a soldering iron but where can I get the extension lead from? I've seen the lead with car lighter attachment but not the other one. However I wouldn't want to damage my machine.

I got one from an AUTO parts company.  Most car accessory shops should stock them or could get you one.

Wish I could remember where I put it, I could use it now!

It used to be with the tyre compressor, but I can't find it.

A thing to watch when using DC power leads is some machines use the centre pin being negative instead of positive as in most cars these days, so be careful when connecting DC power leads.

Also car batteries are not the best to power a CPAP machine off as if the car battery is discharged more that 30% it can start to eat at the battery and dissolve the plates that supply the power.  If using a battery t is best to use a leisure battery, these have heavier plates inside and can be discharged and then recharged without damage (you must charge them up after you use them or store them for any length of time) these batteries are designed for deep cycle discharge and recharge.  They will not get dissolved so quickly and can be discharged 60-70% without any damage to the battery and can be run flatter if need be as long as you charge them right away.

Some machines you can use with a DC to DC adaptor, these adaptors allow you to run on 24vDC as well as 12vDC and will cut the power off if the battery gets lower that 30% discharge, they also protect against reversed polarity.

Unfortunately, the manufacturer has decided to stop making these adaptors.  

Watch the polarity as a mistake will break the machine, there is a diode inside the machine that will blow an internal fuse if you get it wrong (if you are lucky) or it might do more damage.  The fuse is tiny and not something most people could fix as they are usually soldered to the circuit board.  Even if you could get one, I would recommend trying to fix it.

Hi, thanks for all your advice and I did a lot of research but in the end bought both parts compatible with my machine, suffice to say I no longer have to use a noisy inverter and the battery(leisure) lasts longer.

Some of these machines are 24VDC, such as some of the new Resmed machines, just to make life complicated.

You need a 12Vdc to 24Vdc adaptor.  These are £100 + shocking cost for something so simple!

Hi found a USA company that has a large selection of power accessories for CPAP and BIPAP machines, I e-mailed them with the specs on my machine and they confirmed the connection cables I asked for to connect to a car cigar lighter socket and also direct leads to a leisure battery for holidays etc. Contact www.CPAP.com

Update to previous



Sleep2snore said:

A thing to watch when using DC power leads is some machines use the centre pin being negative instead of positive as in most cars these days, so be careful when connecting DC power leads.

By putting a bridge rectifier between the input connector and the unit, the polarity of the voltage applied to the input connector becomes irrelevant.

The polarity at the output of the bridge will always be the same.  

The bridge could also be mounted as an external adaptor between the unit's connector and the voltage source.

I asked Resmed and got this link from them, still not cheap though.

https://mysleep.resmed.com/GB/en/Sleep-Apnoea/Accessories/AirSense-...

I suppose I could fit a 12v ciggy socket near where I sleep, and plug in one of those coke can type inverters, but as it will be running a motor, would it not need to be pure sine wave.

That is under debate, they said at a conference that it had to be a pure sine wave, now they have said in America that it does not have to be.  Sometimes you just so not know what to believe.

A pure sine wave might be better for you and the machine, but if it is just now and again, I would not worry to much about it.

What I would do is ask ResMed, if they say it is fine to use a non-sine wave one that is fine, but I would get this in an email to cover yourself against damage.  If you are not moving every day, I would buy a deep cycle battery, the power supply will cat off when the battery voltage drops below a certain level, but it might be to late to start your engine.   Charge it up in tandem with a non-return diode and a charging circuit to keep it topped up.

Reply to Discussion

RSS

Sleep Apnoea Forum

New to the Sleep Apnoea Forum? 

1. Stop by our Sleep Apnoea Welcome Center to introduce yourself to the SleepGuide community.
2. Start a New Topic of Conversation.
3. Post your photos - of yourself, your old CPAP machine, your new CPAP machine, your pet, something about you!

Interested in advertising, have a problem or need to contact us? Click the Report an Issue page.

 

Latest Activity

Lily Mae updated their profile
2 hours ago
Profile IconKatherine Palmer and Lily Mae joined Hope2SleepGuide
2 hours ago
Judy Y posted a discussion

Sleep apnoea and TMJ

HiI have been using my cpap for about 20 months now. On the whole have got on with it reasonably well.About 6 months ago started to develop a clicking in my jaw (only on the right side) and sometimes could not open my mouth properly, It is quite…See More
Sunday
Janice gordon is now a member of Hope2SleepGuide
Apr 16
Mark A updated their profile
Apr 14
Mark A added a discussion to the group Buy-Sell-Swap
Thumbnail

Philips Dreamstation Auto CPAP APAP perfect condition with case and power supply

Bought this as a second machine for travel then changed jobs so didn’t use it doesn’t have the humidifier but you can buy them no hose or mask but bag etc with manuals …See More
Apr 14
Mark A joined The SleepGuide Crew's group
Apr 14
Edward Kahn added a discussion to the group Buy-Sell-Swap
Thumbnail

Resmed AutoSet S9

Selling a ResMed AutoSet S9Comes in a case with the power supply and a few extra tubesopen to offers and can post to UK + EuropeThanksplease email edd.kahn@gmail.comSee More
Apr 12
Eric Swindon replied to Beany Lad's discussion Advice Required, recently diagnosed with OSA
"That is great news. I tried again to message you but it said "You can't send a message until Beany Lad accepts your friend request." I can send you an unused nasal mask but it is unwise to quote addresses or private email addresses on…"
Apr 12
Beany Lad replied to Beany Lad's discussion Advice Required, recently diagnosed with OSA
"Hi Eric many thanks for your advice. Believe it or no after posting my story last night I think definitely managed to have the best night so far using the mask. After dropping off I did not find myself with a dry throat for the first time. I was…"
Apr 12
Eric Swindon replied to Beany Lad's discussion Advice Required, recently diagnosed with OSA
"Hi, I hope you read this tonight as I think I can help you. I tried to message you but we have to be friends first so my request will end up in your inbox. My first trials were at The Leicester General way back in the 1980's when sleep apnea…"
Apr 11
Beany Lad posted a discussion

Advice Require, recently diagnosed with OSA

Hi allI am so pleased I have come across this forum. To get the best advise I find it best to ask people who have the experience.My storyFor my work as a field based technical engineer I am required to drive long distances daily. Going back a few…See More
Apr 11
Beany Lad updated their profile
Apr 11
Edward Kahn joined The SleepGuide Crew's group
Apr 11
Profile IconEdward Kahn and Beany Lad joined Hope2SleepGuide
Apr 11
Richard lang is now a member of Hope2SleepGuide
Apr 6
Kevin Offland added a discussion to the group Buy-Sell-Swap
Thumbnail

SELLING PHILIPS DREAMSTATION AUTO CPAP

Philips Dreamstation only a few hours use comes with a Resmed mask all tubes power supply, instructions and bag it's in amazing condition no smoking home this is one of the best machines on the market open to sensible offers drop me a message or…See More
Mar 31
Kevin Offland joined The SleepGuide Crew's group
Mar 31
Kevin Offland posted a discussion

For sale Philips dreamstation

Philips dreamstation only a few hours used comes with a Resmed mask all tubes power supply, instructions and bag it's in…See More
Mar 26
Kevin Offland is now a member of Hope2SleepGuide
Mar 26

© 2019   Created by The SleepGuide Crew.   Powered by

Badges  |  Report an Issue  |  Terms of Service