Need Battery Backup (Fast!)

[DeeCPAP]

I have an AirSense 10 and I just want the names of some batteries that will last a few days in case we get the possible hurricane being formed according to the news today. I'm going to Home Depot or Lowe's and I'm assuming it'll cost around $125 or so. I want to plug it in and forget about it. (The specs mentioned on other messages I've scanned make no sense to me). If there's one that's solar powered, great because I live in S. FL about 100 miles from the Bahamas so no one knows what to expect here.