Co-Pilot 12 Add-on Unit to Extend run time of Medistrom Pilot-12 CPAP battery for Respironics and DeVilbiss PAP devices. Co-Pilot 12 is not functional as a stand-alone CPAP battery. Co-Pilot 12 Add-on Unit to Extend run time of Medistrom Pilot-12 CPAP battery for Respironics and DeVilbiss PAP devices. Co-Pilot 12 is not functional as a stand-alone CPAP battery. CO-PILOT 12 Add-on Unit is a cost-effective solution that doubles the capacity of your Pilot-12 PLUS CPAP Battery/Backup Power Supply. NOTE! Pilot-12 CPAP battery is NOT included in this package, and must be purchased separately. Co-Pilot is just an add-on unit and not a stand-alone CPAP battery, It requires Medistrom Pilot-12 in order to operate. The Co-PILOT connects to the Pilot-12 PLUS using the short connection cable, and these two units are held in place together by plastic brackets. All needed accessories are included in the package. Compatible with Pilot 12 PLUS CPAP Battery to be used with Philips Respironics & DeViliss CPAP and most BiPAP machines. While using the Pilot-12 PLUS as a permanent power backup device, you can rest assured that you won't be woken in the middle of the night to find that your CPAP machine is not running. If the power is interrupted at night, your PAP machine will drive power from your Pilot-12 PLUS without any interruption to your therapy. Adding a Co-Pilot 12 unit to Pilot-12 will double your run time during power outages, as well as while traveling.