Energy+usage,+uninterruptable+power+supply+(UPS)

** As long as your computer goes into sleep/standby when you're not using it, your computer doesn't use anything for electricity; compared to the rest of your household. **
//(all drives spinning, processor-intensive task)// || Light use //(e.g., email, word processing)// || (http://michaelbluejay.com/electricity/computers.html)
 * **More Energy** || **Less Energy** ||
 * Ready to be used || Sleep / Standby ||
 * Desktop || Laptop ||
 * Faster processor || Slower processor ||
 * Older processor (Pentium, G3/G4/G5) || Newer processor (Core Duo) ||
 * PC || Mac ||
 * Heavy use
 * On the Internet || Offline ||

A news article addressing the methodological issues = []

__**Uninterruptible power supply (UPS)**__ media type="file" key="VOICE007.MP3" width="240" height="20"

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 * An uninterruptible power supply (UPS) is a device that allows your computer to keep running for at least a short time when the primary power source is lost. It also provides protection from power surges. A UPS contains a battery that "kicks in" when the device senses a loss of power from the primary source. If you are using the computer when the UPS notifies you of the power loss, you have time to save any data you are working on and exit gracefully before the secondary power source (the battery) runs out. When all power runs out, any data in your computer's random access memory ( RAM ) is erased. When power surges occur, a UPS intercepts the surge so that it doesn't damage your computer.**======

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 * The on-battery runtime of most uninterruptible power sources is relatively short—__5–15 minutes__ being typical for smaller units—but sufficient to allow time to bring an auxiliary power source on line, or to properly shut down the protected equipment.**======


 * 1) **Power failure: defined as a total loss of input voltage.**
 * 2) **Surge: defined as a momentary or sustained increase in the main voltage.**
 * 3) **Sag: defined as a momentary or sustained reduction in input voltage.**
 * 4) **Spikes, defined as a brief high voltage excursion.**
 * 5) **Noise, defined as a high frequency transient or oscillation, usually injected into the line by nearby equipment.**
 * 6) **Frequency instability: defined as temporary changes in the mains frequency.**
 * 7) **Harmonic distortion: defined as a departure from the ideal sinusoidal waveform expected on the line.**


 * UPS units are divided into categories based on which of the above problems they address, and some manufacturers categorise their products in accordance with the number of power-related problems they address.**

A news article addressing the matter = []