I have 4 different battery packs. A small one to power my modem when the power went off. I have this anker one which I’ve used to power the refrigerator during a power outage and I have two of these that I’ve used to power computer and other random things 

https://a.co/d/8eP9BWC 

 Awesome, thanks. I've been debating with myself about all this for a while. My backups  really need an upgrade.