DC Power Converter (with Cord) for S9™ CPAP & VPAP Machines

ResMed DC Power Converter (with Cord) for S9™ CPAP & VPAP Machines

4.88 Average Rating of 8 Reviews Read Reviews



ResMed's DC Converter allows you to operate any S9 CPAP or BiLevel Machine (with or without the H5i Heated Humidifier and ClimateLinte tubing) from a 12V or 24V DC Power Source like those found in many cars, boats, trucks and other vehicles. The total length of the cord is approximately 7.5 feet. A DC Adapter Cable, as shown, with "alligator" clips is also included for powering your S9 machine directly to an external battery.

USAGE: This cord will not work with ResMed Power Station (RPS) II Battery Packs. For the RPS II use DC Cable Part 24961 sold elsewhere on this site. Using a non-ResMed DC cord with your S9 CPAP or BiLevel may damage your machine.


Product Information

  • Manufacturer ResMed
  • Part Number(s) 36970
  • HCPCS Code E1399
  • GTIN / UPC Code 00619498369706


Average Rating of
Total 8 Reviews
  • ResMed DC power converter with cord

    It works well. However, the part that clips on to a battery is too short to reach out of the window of our trailer and over to the battery. I will be installing a cigar lighter near the bed for much greater convenience.
    Written by apirozzi, Long Island, Ny2019-04-16
  • Muckpo

    This is the perfect solution for sleep therapy off the grid.
    Written by Kenneth Kalchik, 2017-06-29
  • DC power converter

    Tested out at home before my camping trip. Ran it two nights off of a gel cell 12 volt mid size battery I had purchased to run a small electric boat motor. It may run longer, I did not have any more time before the camping trip. I disconnected the humidifier section of the CPAP so it would draw less power.
    Written by Mike, 2017-05-08
  • Greatly improves quality

    My husband bought this to increase the power of my CPAP (S9) when we travel. What a BIG difference it made for us! We love it. Me because it works and works and works and him because he doesn't have to think about it at all. We both highly recommend it. P.S. I also love Direct Home Medical - their shipping is faster than the speed of light. Honestly.
    Written by Thumper E, 2015-08-16
  • genuine ResMed REF# 36970 DC/DC Converter with cigarret lighter plug and additional battery clip-on adapter

    This is the genuine ResMed REF# 36970 DC/DC Converter with cigarret lighter plug and additional battery clip-on adapter, shipped in original ResMed box, inside a second box for added shipping protection. This DC/DC Converter replaces the normal AC power brick which plugs into a normal wall AC power outlet. It is power efficient, which will allow the battery run time to be longest. (Alternatively, one could instead use an inverter plus the normal AC power brick, but an inverter plus the normal AC power brick would be less power efficient, so the battery run time would be shorter.) Great price and proper shipping.
    Written by Vaughn, 2014-12-16
  • great item

    this will be used at my cabin and also at the deer shack, both are off the grid.
    Written by CARL K, 2014-03-28
  • 12V-DC power for you S9 CPAP

    This was just what the doctor ordered for taking my CPAC on my boat. Pun intended. The unit comes with a cigarette type connector which my boat had wired up all ready as well as an adapter to get power right from the battery lugs. I would recommend this to anyone needing to run their machine from a 12V battery. Example Boat, Camper, and Power-outages.
    Written by Don G., 2013-08-25
  • Functional but mis-designed

    This is the only dc power cord available for the ResMed S9. DirectHome service was excellent both in getting it delivered and in getting me in contact with the maker. But the maker needs to rethink their design. This is for use on a boat (or other non-AC use like a car or van) and the total cord length is only 6ft long. Unless you want to sleep at the nav station, you're going to need a dc extension cord!
    Written by Ken, 2013-04-17