Do I need a UPS for my office?

A UPS is a battery in a box that rides through short power interruptions. Whether you need one depends on what a sudden power loss would cost:

• Yes, if equipment would be damaged or corrupted - network storage, a server, an EFTPOS base station or a router mid-write.
• Yes, if a brief blink stops trading - the blackouts that matter are usually seconds long, which is exactly what a UPS covers.
• Probably not, if everything is a laptop - laptops carry their own battery already.

A small UPS is a few hundred dollars and works quietly dozens of times a year without you noticing.