Is there a cheap option to keep an Airsense 11 going during a power outage for 4-6 hrs? I don’t need portability or days of use. I don't have an Airsense 11 but for my airmini or my Airsense 10 (with tubing and humidifier deactivated) I use Ravpower AC banks. https://www.ravpower.com/products/rp-pb...