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: 101

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

Ellen Phillips is now a member of Hope2SleepGuide
Wednesday
Mathura Dutt Kalauny replied to Mathura Dutt Kalauny's discussion Pressure difference between Resmed S8 Vs Breas Z1
"Yes, it is. It is also less cumbersome due to its small size. Thanks."
Wednesday
Sleep2snore replied to Dave Cheeseman's discussion New diagnosis!
"If you do buy one make sure you get a good one and ask if they will look after it if you do buy one. Some clinics will supply filters and check it every year after the warranty is out.  They might even repair and give you a loan machine. …"
Tuesday
Sleep2snore replied to Ruth Furniss's discussion New to cpap
"It is quite normal, some feel it interrupts sleep due to using the machine and mask, turning over can disturb you with the mask moving and leaks.  Give it a month or two and you should start to feel a lot better.  If not contact your Sleep…"
Tuesday
Sleep2snore replied to Mathura Dutt Kalauny's discussion Pressure difference between Resmed S8 Vs Breas Z1
"It may be just responding a bit quicker or just suits you better. It amazes me that anything so small can produce enough pressure to work in the first place. I wouldn't worry about unless you start to feel it is not keeping you feeling…"
Tuesday
Kath Hope replied to Mathura Dutt Kalauny's discussion Pressure difference between Resmed S8 Vs Breas Z1
"You're welcome Mathura"
Monday
Mathura Dutt Kalauny replied to Mathura Dutt Kalauny's discussion Pressure difference between Resmed S8 Vs Breas Z1
"Hi Kath Thank you very much for your response.  No I am not travelling. There is a significant difference in pressure in the two machines. That was the cause of my worry. Thank you again for allaying it. Regards"
Monday
Kath Hope replied to Mathura Dutt Kalauny's discussion Pressure difference between Resmed S8 Vs Breas Z1
"Hi Mathura and welcome to our forum.  With good results like that it shouldn't cause a concern, as it could just be that the Z1 algorithm suits you better.  Just like with masks suiting people better, so can machines, but mostly…"
Sunday
Mathura Dutt Kalauny posted a discussion

Pressure difference between Resmed S8 Vs Breas Z1

I have been using RESMED in auto mode. The pressure used to settle around 11cmWG with AHI between 2 and 4. I have recently switched over BREAS Z1 in auto mode. The pressure has now changed to around 5.5 cmWG with AHI remaining below 5. What would be…See More
Sunday
Profile IconMathura Dutt Kalauny and callum blackley joined Hope2SleepGuide
Apr 14
Kath Hope replied to Savannah A.'s discussion Sleep Centre in UK that measures UARS
"Great to hear you're having an in-patient sleep study Savannah.  You may not need to investigate UARS either, because if a simple study (probably pulse oximetry) has picked up an issue that warrants an in-patient study, then it's…"
Apr 13
Kath Hope posted a discussion

Philips Respironics New Sleep Apnoea Diagnostic Service

If you snore and are tired, you could be suffering from sleep apnoea (see signs + symptoms on our website)…See More
Apr 8
Kath Hope replied to Ruth Furniss's discussion New to cpap
"Sometimes the tiredness can feel worse Ruth if you're having some interrupted sleep when new to CPAP.  I definitely felt like that.  Although I'd been diagnosed with severe sleep apnoea I slept through it all, whereas when I was…"
Apr 8
Ruth Furniss posted a discussion

New to cpap

Hi I'm new to cpap nearly 2 weeks into therapy and feel really tired has anybody felt like this? Or is it normal to feel like this when new to cpap? See More
Apr 8
Ruth Furniss is now a member of Hope2SleepGuide
Apr 7
Savannah A. replied to Savannah A.'s discussion Sleep Centre in UK that measures UARS
"Dear Sleep2snore, thanks for your reply and apologies for my late response. In the case that UARS is detected, may I enquire what you mean regarding a more complex machine? Are you referring to BiPAP machines? Many thanks!"
Apr 4
Savannah A. replied to Savannah A.'s discussion Sleep Centre in UK that measures UARS
"Dear Kath, many thanks for your reply and the link to the page; apologise my late response. I have recently had a simple sleep study done at home, and am awaiting a more comprehensive inpatient sleep study. I will ask whether Esophageal…"
Apr 4
Chris Vesey replied to Chris Vesey's discussion Dvla / hospital
"hi, still no letter from dvla, after advice from sata I have contacted my mp. in 2016 there was a report from the ombudsman criticising the dvla for its delays, chris"
Apr 1
Amelia Kennedy updated their profile
Mar 31
Amelia Kennedy updated their profile photo
Mar 31

© 2018   Created by The SleepGuide Crew.   Powered by

Badges  |  Report an Issue  |  Terms of Service