28 Setting Up Your Computer
Power Protection Devices
Several devices are available to protect against power fluctuations and
failures:
• Surge protectors
• Line conditioners
• Uninterruptible power supplies (UPS)

Surge Protectors

Surge protectors and power strips equipped with surge protection help
prevent damage to your computer from voltage spikes that can occur during
electrical storms or after power interruptions. Some surge protector
manufacturers include warranty coverage for certain types of damage.
Carefully read the device warranty when choosing a surge protector. A device
with a higher joule rating offers more protection. Compare joule ratings to
determine the relative effectiveness of different devices.
NOTICE: Most surge protectors do not protect against power fluctuations or
power interruptions caused by nearby lightning strikes. Disconnect the network
cable from the network wall jack during electrical storms.

Line Conditioners

NOTICE: Line conditioners do not protect against power interruptions.
Line conditioners are designed to maintain AC voltage at a fairly constant
level.

Uninterruptible Power Supplies

NOTICE: Loss of power while data is being saved to the hard drive may result in
data loss or file damage.
NOTE: To ensure maximum battery operating time, connect only your computer to a
UPS. Connect other devices, such as a printer, to a separate power strip that
provides surge protection.
A UPS protects against power fluctuations and interruptions. UPS devices
contain a battery that provides temporary power to connected devices when
AC power is interrupted. The battery charges while AC power is available. See