Co-Pilot 24 Add-on Unit to Extend run time of Medistrom Pilot-24 CPAP battery for ResMed PAP devices. Co-Pilot 24 is not functional as a stand-alone CPAP battery.<img src="http://ecx.images-amazon.com/images/I/31JOcFSjDTL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31PhTwrMD4L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31dgtYaOfOL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31ZRXdFAeiL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41h0BNebhKL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41qfW2Nc7kL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41tIJG0AofL.jpg" noproxy>