I recently was tested and found out I have sleep apnea. I obtained a 110 volt breathing machine I have to wear at night (I sound like Darth Vader). Does anyone have any experience with using a 12 volt battery and converter to run my machine when camping or staying at my no electric cabin up North? does a deep cycle battery last all night? a couple of nights? Before the breathing machine I sometimes had a hard time staying awake to drive home.