This specialized DC Cable is designed exclusively to plug S9 Series CPAP/BiLevel machines into ResMed Power Station (RPS) II Battery Packs.
The DC Cable plugs into the same port, on the back of S9 Series CPAP/BiLevel machines, as the S9's standard AC Power Supply and will allow you to power your CPAP/BiLevel machine directly from the RPS II Battery Pack.
Usage Information: Before using this cable remove the protective end cap from the machine end of the cable which is used for packaging and transport. This cord will not work with standard 12V cigarette lighter power sockets. For cigarette lighter DC power sockets use ResMed's S9 DC Power Cord (Part 36970) sold elsewhere on this site.