Dreamstation DIY Battery backup

[rick71]

I have a Dreamstation CPAP. I'd like to homebrew a battery backup. The power supply cable has three wires, black, white, blue. Does anyone know how to wire this to a 2 post battery? I was planning to use power poles to battery clamps, but I am unsure how to move from the 3 wires to 2.
Thanks

[Dog Slobber]

Wire a cigarette adapter on to the battery, then use a DC cord specifically designed for the DreamStation.

$30 bucks at CPAP.COM

https://www.cpap.com/productpage/pr-dre ... ed-dc-cord

You can also get cheaper off brand DC cords.

[rick71]

Thanks for the advice. I have both ordered.
I'd still like to know how to take a regular Dreamstation power supply, cut the cable that connects to the Dreamstation at the power supp and wire that to battery clamps.
Again, thank you for the input.

[Dog Slobber]

http://www.apneaboard.com/forums/Thread ... ery-Cables

3 conductor cable:

Outer Barrel: Common
Inner Barrel: +12v
Centre Pin: 20K ohm resister +12v . In the topic there are ambiguities regarding resister. Originally claim to be 100K, then 20K, then 24.3K.

The connector is similar to that found on many laptop chargers.

[rick71]

Thank you so much