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[Equipment] Battery usage with CPAP (S7 and A10)
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Bhante Offline


Posts: 7
Joined: Aug 2016

Machine: Resmed S8
Mask Type: Full face mask
Mask Make & Model: 1
Humidifier: 1
CPAP Pressure: 1
CPAP Software: ResScan

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Sex: Undisclosed
Location: World

Post: #11
RE: Battery usage with CPAP (S7 and A10)
(07-19-2016 12:03 PM)MrGadget Wrote:  I have an S8, not an S7, so my first question has already been confirmed previously about the center pin polarity. So I either need to buy one of the aftermarket DC adapters for the s8 $100 on ebay (because there are no original DC-12's available at any CPAP store, they all show discontinued) or just make one of my own, but I don't have access to the power filter part, and that may be critical.

I've used an S8 directly connected to a 12V battery, which works very well. The fully-charged voltage of over 14V goes fine, and it works well down to under 12V - I think around 11V but I can't remember exactly. More often I've used it with a cheap (circa $2 from Ebay from China, with XL4015 regulator chip) step-up adapter, which also works very well. The adapter is set to give output at 12V; if the input from the battery is less than this it will be stepped-up to 12V, if the battery is more fully charged and over 12V the regulator will just pass it through. The S8 is not fussy. The humidifier does not work on DC though, unfortunately.
08-26-2016 06:24 AM
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