CPAP batteries

Hi all, I am nearly clueless about batteries. I have a now discontinued Goal Zero as backup now. When needed, I plug my ResMed S9 (disconnected humidifier) into it and away I go. Just had a power outage and at 50% charge, I got fewer than 5 hours. I need more charge than that as backup. Pressure range is 9.8-16, average (or is that 90%?) last session was 13.2 which is typical, rare for me to need above 14. I have never needed more than 8-9 hours during an outage. Really think I should have 3-4 nights backup, just in case.

I just found this on Amazon "https://www.amazon.com/dp/B076PR4TBZ/re ... B071FZRY7H". It says it says it supports CPAP devices:

• AC/DC/USB Outputs: (2x) AC outlet (max 100W, peak power 150W); (4 x) DC port (15A / 180W max); (1x) QC3.0 USB port (18W max); (3x) USB ports (10.5W max); charges or powers products such as laptops, phones, tablets, cameras, drones, CPAP machine, small home appliances and more

• On-the-Go Power Source: 150Wh (3.7V 40500mAh/11.1V 13500mAh) powerful charging station for camping or emergency backup; probably the most compact power station with a size of 7.3*4.3*4.7 inch, and the weight is only 2.9 lbs; 2 hideable lift handles make it even more portable

How many nights would I likely get out of this battery during an extended power outage (rare for Atlanta, GA)? What do I need to be looking for in terms of the battery for my S9? Help.

When you used the Goal Zero battery, were you using the AC household outlet (standard 3-prong) or a 12-volt cigarette adapter? The 12-volt should last much longer because you are losing quite a bit of power as heat byproduct changing DC to AC back to DC. Just a thought.

Weagle wrote: ↑

Tue Dec 18, 2018 12:34 pm

When you used the Goal Zero battery, were you using the AC household outlet (standard 3-prong) or a 12-volt cigarette adapter? The 12-volt should last much longer because you are losing quite a bit of power as heat byproduct changing DC to AC back to DC. Just a thought.

I plugged into the standard 3-prong outlet on the battery. I watched an online video for using the Escape for CPAP and that's what they showed for the ResMed S8 (old video). At that time, they said it lasted 2 nights (16 hrs) with no humidifier and at pressure 12. I know the ResMeds require some sort of adapter so I went with I saw. Like I said, I am pretty clueless re electricity.