uninterruptible power supply (UPS)
A UPS is designed to protect everything that's plugged into it from power surges, power sags, and even power outages. The device contains one or more batteries and fuses. Energy is stored in the batteries, and if the power fails, the batteries can power the computer for a period of time so the administrator can safely power it down.
Alternate answers seen on other CBTs
The same question shows up worded slightly differently across CBT versions. Here are the other answer variants we've indexed.
A device that can provide short-term power, usually be using batteries.
Aup Security Plus →An online power protection device that isolates a computer or other device plugged into it. During normal operation, the devices run directly off the battery through an inverter, rather than switching to the battery only after a loss of power.
Comptia A+ Free Study Guide →an alternative power supply device that protects against the loss of power and fluctuations in the power level by using battery power to enable the system to operate long enough to back up critical data and safely shut down
Gibson Security Plus →This is a type of self-charging battery that can be used to supply consistent clean power to sensitive equipment.
Osg Cissp →