CPAPtalk.com

Firedexxer wrote: ↑

Thu Oct 13, 2022 5:09 pm

Kind of off topic sorry. Have you guys noticed any degradation in battery life in colder temps? If so how did you solve that problem?

I've had a battery (Omni 25,600) crash due to cold temps in Death Valley. We were dispersed camping near Dante's View and, while I'm not sure how cold it got, my truck indicated 25 F when I woke up in the morning. I went to bed shortly after sunset due to the cold temps and woke up a couple of hours later with a non-op cpap machine. I checked my battery and it was fully depleted. I generally get two 7-hour nights out of this battery, for reference purposes. We spent the next night near Mt. Whitney and I made sure to keep my battery between my pillow and my sleeping pad and the cpap machine in my pack, wrapped in a down jacket. It was snowing when we woke up and my cpap ran all night. I don't have a travel cpap so I just take my Airsense 10 along whether it's car camping or an overnight backpacking trip. One of these days I'll have to upgrade.

stevenal wrote: ↑

Thu Mar 23, 2023 1:30 pm

Is this a 12V battery? Zs want 15V.

Short answer is "no, it's not a 12 volt battery". I run the Z2 at 15 volts using phone/laptop battery packs that support USB C PD

To deliver 15 volts to the Z2 I use a 15V USB C Type-C PD Trigger Power Cable 5.5 x 2.5mm DC Connector like this one from JacobsParts:
https://www.amazon.com/gp/product/B08NTTK8S9

The battery MUST support USB C PD power at 15 volts. Be careful, not many of them support voltages higher than 12 volts. All the ones I have found have capacity higher than 20000 mAh. Usually somewhere on the battery you will find a line that tells what voltages the usb-c PD port can provide. It might look like this:
PD output: 5v=3A, 9v=3A, 12V=3A, 15V=3A, 20V=4.5A

One battery I like for backpacking is:
https://www.amazon.com/gp/product/B09QRRGR9J/