Dell Studio 1558 (Early 2010) - Manual (Page 140)

140
Power (Power Settings, Power Protection Devices, and Batteries)
Power Protection Devices
Interference or fluctuations in the power supplied to your computer can cause
crashes and sometimes permanent damage to your computer. Surge
protectors, power line conditioners, uninterruptible power supplies provide
protection for your computer.
Surge Protector
Plug your computer power line into a surge protector or power strip equipped
with surge protection to 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. When lightning occurs in
your area, disconnect the telephone line from the telephone wall jack and
disconnect your computer from the electrical outlet.
Many surge protectors have a telephone jack for modem protection. See the
surge protector documentation for modem connection instructions.
NOTICE:
Not all surge protectors offer network adapter protection. Disconnect the
network cable from the network wall jack during electrical storms.
Power Line Conditioner
NOTICE:
Power line conditioners do not protect against power interruptions.
surge protector power line conditioner uninterruptible
power supply