[Elecraft] K3S and power failure

[Bob Novas]

My house occasionally has a power failure, typically lasting less than a
minute. One just happened.  Do I have to worry about operating the K3S and
having a power failure?  It would be like turning off the power supply
without first turning off the K3S, and I understand that's not recommended.
Do I need a UPS for the K3S?  What would be nice would be a small battery
that powered the smarts independently of the mains supply.  Bob - W3DK