Using CPAP on a plane

Has anyone successfully used their CPAP on a plane? I have a 10-hour overnight flight coming up and am going to try it. I have Dreamstation 2 and a pilot 12 battery. I will turn off the humidification and heat and I've heard of people setting the machine on the floor while it is plugged into the battery. The airlines make you have a battery as you can't plug into the plugs provided. I have never successfully slept on a plane and I wonder if it is because I didn't have a CPAP at the time. I also bought some smaller bottles of distilled water I'm going to attempt to get through TSA. It says on the website that you can have medically needed liquids over 3.5 oz in your carry-on. Has anyone else done this?