Neither, spend some more and get a UPS.

https://www.amazon.com/dp/B085JJZDFK

https://www.amazon.com/dp/B00DBAA696

Its extra piece of mind for sudden power outages or brownouts. Not meant to run your devices for a long time just long enough for you to shut them down properly in the event of an outage or get you through those quick flash outages that only last a second or two in bad weather.

I have this one, and it works well: https://www.amazon.com/gp/product/B00DBAA696/