Line Conditioners; Uninterruptible Power Supplies - Gateway E-5400 System Manual

Check the energy absorption, or dissipation, rating. The higher the energy
absorption rating, the better the protection for your system.
Check for line-conditioner capabilities. A line conditioner smooths out
some of the normal line noise (small voltage fluctuations) of an electrical
supply.

Line conditioners

A line conditioner protects your system from the small daily fluctuations in
voltage from an electrical supply. Most systems can handle this variation, or
line noise, without problems. However, some electrical sources include more
line noise than normal. Line noise can also be a problem if your system is
located near, or shares a circuit with, a device that causes electromagnetic
interference, such as a television or a motor.
Some surge suppressors and uninterruptible power supplies include simple
line-conditioning capabilities.

Uninterruptible power supplies

Use a standby uninterruptible power supply (UPS) to protect your computer
from data loss during a total power failure. A UPS uses a battery to keep your
computer running during a power failure and lets you save your work and
shut down your computer. You cannot run your computer for an extended
period of time while using the UPS.
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Managing Your System