Brownout: A dip in electricity, usually due to high demand: also called a "sag".
Power Conditioner: A device that evenly regulates the voltage that powers electronic equipment.
Run Time: The length of a UPS's battery backup time.
Spike: An intense, temporary voltage increase, usually caused by lightning.
VA (voltage-amps): This is power-output rating for a device-the higher the VA rating, the more demand can be placed on it.
UPS (uninterruptible power supply): A battery backup device for electronic equipment