The DC Adapter Cable has a 12 VDC receptacle with Positive Polarity, or sometimes called Positive Hot when attached to a 12 VDC battery properly.
The Phillips Respironics 12VDC battery adapter cable will let you charge and run your CPAP machine from 12V battery with exposed terminals. The battery adapter cable, as shown with its red and black clamps hook directly to battery terminals, provides a 12V outlet. One end of the 12V cord, or cigarette lighter cord, can be plugged into the 12V outlet of the battery adapter cable while the other end is plugged into the 12V DC input port on the Phillips Respironics CPAP machine.
You can use any 12V battery that have their battery terminals exposed. For example,car batteries and deep cycle marine batteries.A DC power cord is needed in order to use this adapter.
