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<?xml version="1.0" encoding="utf-8"?>
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<page xmlns="http://projectmallard.org/1.0/" type="topic" style="ui" id="power-batteryestimate" xml:lang="id">
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<link type="guide" xref="power#battery"/>
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<revision pkgversion="3.4.0" date="2012-02-20" status="review"/>
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<desc>The battery life displayed when you click on the <gui>battery icon</gui> is an estimate.</desc>
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<credit type="author">
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<name>Projek Dokumentasi GNOME</name>
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<email>gnome-doc-list@gnome.org</email>
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<credit type="author">
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<name>Phil Bull</name>
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<email>philbull@gmail.com</email>
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<credit type="author">
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<name>Ekaterina Gerasimova</name>
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<email>kittykat3756@gmail.com</email>
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<include xmlns="http://www.w3.org/2001/XInclude" href="legal.xml"/>
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<mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
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<mal:name>Andika Triwidada</mal:name>
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<mal:email>andika@gmail.com</mal:email>
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<mal:years>2011, 2012</mal:years>
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<title>The estimated battery life is wrong</title>
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<p>When you check the remaining battery life, you may find that the time
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remaining that it reports is different to how long the battery actually lasts.
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This is because the amount of remaining battery life can only be estimated.
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Normally, the estimates improve over time.</p>
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<p>In order to estimate the remaining battery life, a number of factors must be
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taken into account. One is the amount of power currently being used by the
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computer: power consumption varies depending on how many programs you have
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open, which devices are plugged in, and whether you are running any intensive
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tasks (like watching a DVD or converting music files, for example). This
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changes from moment to moment, and is difficult to predict.</p>
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<p>Another factor is how the battery discharges. Some batteries lose charge
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faster the emptier they get. Without precise knowledge of how the battery
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discharges, only a rough estimate of remaining battery life can be made.</p>
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<p>As the battery discharges, the power manager will figure out its discharge
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properties and will learn how to make better estimates of battery life. They
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will never be completely accurate, though.</p>
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<p>If you get a completely ridiculous battery life estimate (say, hundreds of
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days), the power manager is probably missing some of the data it needs to
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make a sensible estimate.</p>
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<p>If you unplug the power and run the laptop on battery for a while, then
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plug it in and let it recharge again, the power manager should be able to get
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the data it needs.</p>
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gnome-help/id/power-batteryestimate.page
