A couple of years ago, my wife and I were reminiscing about camping with our respective families as children. She remembered how much fun she had camping out nearly every Summer with her mom and three siblings. I had similar fond memories. I especially enjoyed breakfast when we were travelling cross country. Dad would always buy fun things like sweet rolls and milk, or those little variety pack miniature boxes of “sugar” cereals–the kind we normally never got. Dad would cut open the boxes along the perforations, open up the “barn doors” and pour the milk right in the box. Sometimes they leaked, but it didn’t matter when you were sitting at a pic-nic table.
“Those are great memories.” I said, ”Why don’t we go camping more?”
She looked at me to see if I was joking.
“We don’t go camping because you hate camping.”
“I don’t hate camping.” I said, feeling a little defensive. “Besides, we go camping all the time. What about the time we went camping with your mother to the San Juans Islands?”
“Honey, that was 15 years ago.”
“Oh.”
Okay, she’s right. Camping isn’t my favorite thing to do, especially since I’m the one that has to do all the heavy lifting of putting up and taking down tents that my Dad used to do. But since my oldest boy started in Scouts two years ago, I’ve been doing a lot more of it. For example, last weekend we went on a snow camp out at a ranch along the road to Cascade, Idaho. There was literally 5 feet of snow on the ground.
As mentioned in previous posts, when your CPAP machine doesn’t work on a camp out, it makes for a very long, tiring experience. This time around I was confident that I was well prepared. I had my fully charged, massively over-sized, 25 lb., 30-Amp-Hour marine battery with enough capacity to run my CPAP for several nights without a recharge. I even brought a Mr. Heater
portable propane heater so I could warm things up if it got too cold. There was no way I would go without sleep that night.
My Respironics
REMstar
Plus
worked perfectly when I hooked it up and I drifted off to sleep at 11:30 and slept soundly for about three hours. That’s when my CPAP machine stopped working. The LCD backlighting was flashing, just like it did at Blue Lake when my battery voltage dipped too low. How could this be possible? I had tested my battery before leaving, so I knew it had a full charge, but no amount of “rebooting” my machine seemed to work. The rest of the night was a stark reminder of how unrestful sleep is without my CPAP machine. I staggered through the following day like a zombie.
When I got home I hooked up my battery to the charger: the needle swung to the far left: it was fully charged! So at work on Monday I talked to an Electrical Engineer friend of mine. How could my fully charged 30+ Amp-Hour battery possibly not run my CPAP machine? He said it probably just got too cold. I had the battery on the tent floor next to me, but under two thin, uninsulated sheets of fabric was snow. Effectively my battery was on ice. My engineer friend thinks I may have gotten a full night sleep if I had just put the battery on a sheet of styrofoam to keep it warm. D’Oh!
If I had realized that cold would be an issue, I would have kept my battery indoors for several days before the campout to get it warmed up to room temperature (the garage is cold and batteries are heavy so they change temperature slowly) and I would have kept it in an insulated box.
This is all just a theory at this point. It could be that my CPAP machine just doesn’t like the cold and the battery wasn’t the problem in either case. But I intend to get a more definitive answer before my next cold-weather camp out. When I do, I’ll let you know here.