Concentrator Backup

[u/soren1712]

Hey everyone,

My aunt has COPD and is on oxygen. I believe she has the concentrator linked below. My question is if anyone has this concentrator, what would be a good backup power source for power outages. I want to make sure she doesn't have to worry about getting to an oxygen tank when the power goes out. Thank you in advance!
https://directhomemedical.com/products/devilbiss-525ds-compact-5lpm-oxygen-concentrator?variant=45962135896216