Your computer, modem, phone or other components then plug into the device. Both surge suppressors and UPSs have pros and cons, mainly regarding cost and efficacy. Surge Suppressors Surge suppressors are the basic form for protecting your computer against errant electricity. The suppressor maintains a constant flow of power to the computer, suppressing damaging voltage surges. The suppressor may operate by absorbing the surge, blocking the surge, or a combination of the two.
Surge suppressors are the less expensive choice for protection.
But many of the surge suppressors available in retail stores are little more than a power strip. When browsing your choices, compare ratings. Remember your initial investment, and spend as much as you think it's worth to protect. UPSs contain an internal battery that charges itself when there is power, in preparation for when there is not. In the event of an outage, the UPS switches to a battery that delivers full power.