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GoodKnight 420 Series 12 Volt DC Power Cord (connects CPAP to cigarette lighter socket)
Sorry, this item is no longer available.
Sorry, this item is no longer available.
GoodKnight 420 Series 12Volt DC Cord Overview
Features
Important Tips
Videos
FAQs
Customer Reviews
This cord is compatible with the following machines:
- 420G
- 420S
- 420E
This cable will not work with the GoodKnight 425 or 425 ST. The 12 volt jack on the 425 Bilevel is not the same size as the 420 series CPAP machines. To connect a 425 BiLevel to a socket similar to a car's cigarette lighter outlet, use the 12 Volt DC Power Cord.
We include information about the power needs and capacities on the CPAP.com pages our products. Please see the "POWER" tab on any machine product page for this information. You can also see a summary of the voltage range and whether it is DC capable on our Compare Charts.
Here is a video explaining differences in power cords and power supplies of various CPAP machines:
All CPAPs will operate on DC power with the use of an Inverter to change the current from DC to AC before it reaches the machine. However, many will operate on DC power without the need for an inverter, just a power cord that plugs into the CPAP and ends in a cigarette lighter plug.
Inverters do require a lot of power. If you need to use an inverter to run your machine on battery power, the inverter will probably take about half the life off the battery.
To determine if your CPAP will operate without an inverter, look for a DC outlet on the machine, either at the back or on the side, with a single opening directly in the center. It should be labeled "DC POWER" or similar term. You can also review our Compare Charts to see if your machine has a optional DC cable option.
Here is a video describing different DC cable and battery options for various machines:
All the models CPAP.com sell contain power converters that enable the machine to operate on any AC current from 100 to 240 volts without any adjustment.
All machines can connect to DC power. Some machines are configured to operate on DC Power and have a DC power outlet. Other machines require AC power and will need an Inverter that turns DC power to AC power.
Having the proper equipment is the biggest key to successfully operating the machine from a battery. For example, if your machine does have a DC outlet and you want to run your machine from a marine battery, be sure to get the correct DC cable for the machine, as well as an adapter cable with alligator clips that fits over the cigarette lighter plug.
CPAP.com sells complete battery kits with everything you need for many machines including the correct cables for those machines and batteries. If you have questions about the specific power needs of your machine, review the 'Power' tab found on the machine's product page, or give us a call at 1-800-356-5221.
There are small, portable battery packs that will operate a CPAP set at 10cm for at least one night, or about eight hours. CPAP.com sells full Battery Kits that come with everything needed to run your machine off battery power including the correct cables needed for your machine and a battery. You can find the battery kit for your machine Here. On each battery kit page, you can input your machine and pressure setting to see an estimate battery life for your machine.
Some machines have batteries created to be used specifically with them only. Here are some of the machines we carry with integrated or specialized battery options:
Transcend EZEX miniCPAP™ Machine
Z1 Travel CPAP Machine
Transcend Auto miniCPAP™ Machine with EZEX
Z1 Auto Travel CPAP Machine
CPAP.com sells Battery Packs to accompany your machine if an integrated battery is not available. Visit CPAPtalk for more advice specific to your needs, or view this past thread on the topic here.
The connector does what it's supposed to. Long cord. Machine takes about a minute to get up to speed. Great in... an SUV. more...
I bought a Respironics Battery Kit for a family members BiPAP from another Internet supplier. Somehow, the 12 VDC... cigarette lighter socket was damaged or stopped working during a recent use. I sought replacement from the same supplier and found the price to be comparatively too high. While searching for other Internet suppliers I found CPAP.com carried the replacement at a lower and fair price. I also found the shipping response to be excellent. more...
If you have to sleep in a vehicle, then this is a must have. Works great.
I have always wanted more portability in my cpap. Had an occasion to try it out. Was very pleased and... surprised at how little it drew on the battery over night. HIGHLY RECOMMEND!! more...
I haven't had the opportunity to use the DC plug yet, but it certainly is a great convenience for those... of us who drive long distances and need to sleep why hubby takes over the wheel. I have become dependant on my CPAP over the years, not being able to sleep without it. This will also allow me to sleep on our boat when there is no regular power source, as well as our travel trailer. I am very happy to have this option and plan on purchasing a battery pack for it too, at a later time. more...
My husband is a commercial Truck Driver, and this fits the bill, he can use his CPAP when on the... road. The cord is long enough, and works great. more...
Great product! So nice to now have a CPAP machine that converts simply to 12 volt with a adapter... cord only. No pure sine inverters, no huge battery packs and no not another $300. Just the cord. Works great for camping with no power hookups. more...
Everything worked out well. Thank you for providing access to purchasing parts, some of which are not readily available... elsewhere. You met my needs. Thank you. more...
works really well. I use this when we go camping. Before I would have to run generator all night just... to power my cpap. more...
This cable is much longer than I expected: a true bonus. It appears to be about 15 feet long.
Thank you for your great service and speed. I'm goint on vacation and needed everything pretty quickly. I got exactly... what I paid for! more...
after three times i think i have all the parts to use this battery pack--lets hope it works