Background:
I suffers from Sleep Apnea - a type of sleeping disorder that is very common to overweight person, almost 25% of population suffers this problem yet only about 50% or less are getting it treated. Basically, Sleep apnea is an interruption in breathing during sleep due to blockage in airway, the blockage can last for 10 - 20 seconds and 100 times in an hour. While a person with sleep apnea cannot suffocate – the brain will wake the person up enough to tighten the muscles at the back of the throat to allow airflow. This resulted in snoring or snorting loudly. Due to the repeated sleep interruption, the sufferers gains no rest in the sleep.
A CPAP (constant Positive Air Pressure) machine would keep air flowing and would then give relief and provide good night sleep.
Anyhow, because of the problem, I carry my CPAP machine with me to the bush.
I use Respironics M series with a 12V LI-Ion battery purchased from fleabay.
In winter, I place machine inside the sleeping bag with me so I can breath warm air, but suffers when I farted..

In other seasons, I made a small bag hook at the end of my hammock to hang the machine.
Total weight of my setup is about 2kg, and the size of a shoe box. which is a shame because this can be used to carry more food or gear to say longer in the bush.
But such is life.