I feel like I'm missing something. How do I use this with my medistrom battery?
Going from the wall to the machine, you will first have your power supply that came with the AirSense 11 machine, then you will connect one of the two cables from this kit to that cable and connect the other end to the medistrom pilot 24 lite battery. The other cable from this kit will go in to the DC out port of the battery and connect to the AirSense 11. In this way, you can leave the battery plugged in in-line with the machine so that you have a backup in case of a power outage and your battery is always ready to go. If you are taking it camping or some place without an input power source, you would simply use just the cable between the battery and the machine to run the machine.