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<page xmlns="http://projectmallard.org/1.0/" type="topic" style="tip" id="power-batterylife" xml:lang="fr">

  <info>
    <link type="guide" xref="power"/>
    <link type="seealso" xref="power-suspendhibernate"/>
    <revision pkgversion="3.2" date="2011-09-26" status="final"/>
    
    <desc>Tips to reduce your computer's power consumption.</desc>
    
    <credit type="author">
      <name>Le projet de documentation GNOME</name>
      <email>gnome-doc-list@gnome.org</email>
    </credit>
    <credit type="author">
      <name>Phil Bull</name>
      <email>philbull@gmail.com</email>
    </credit>
    
    <include xmlns="http://www.w3.org/2001/XInclude" href="legal.xml"/>
  
    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
      <mal:name>Luc Pionchon</mal:name>
      <mal:email>pionchon.luc@gmail.com</mal:email>
      <mal:years>2011</mal:years>
    </mal:credit>
  
    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
      <mal:name>Claude Paroz</mal:name>
      <mal:email>claude@2xlibre.net</mal:email>
      <mal:years>2011</mal:years>
    </mal:credit>
  </info>

<title>Use less power and improve battery life</title>

<p>Computers can use a lot of power. By using some simple energy-saving strategies, you can reduce your energy bill and help the environment. If you have a laptop, this will also help to increase the amount of time that it can run on battery power.</p>

<section id="general">
 
 <title>General tips</title>
 <list>
  <item>
   <p><link xref="shell-exit#suspend">Suspend your computer</link> when you are not using it. This significantly reduces the amount of power it uses, and it can be woken up very quickly.</p>
  </item>
  <item>
   <p>Turn off the computer when you will not be using it for longer periods. Some people worry that turning off a computer regularly may cause it to wear out faster, but modern computers are quite robust, so this shouldn't be an issue.</p>
  </item>
  <item>
   <p>Use the Power Management preferences to change your power settings. There are a number of options that will help to save power: you can <link xref="display-dimscreen">automatically dim</link> the display or send it to sleep after a certain time; <link xref="power-brighter">reduce the display's brightness</link> (for laptops); and have the computer <link xref="power-suspendhibernate">automatically go to sleep</link> if you haven't used it for a certain period of time.</p>
  </item>
  <item>
   <p>Turn off any external devices (like printers and scanners) when you're not using them.</p>
  </item>
 </list>
</section>

<section id="laptop">
 <title>Laptops, netbooks, and other devices with batteries</title>

 <list>
  <item>
   <p><link xref="power-brighter">Reduce the screen's brightness</link>; powering the screen accounts for a significant fraction of a laptop's power consumption.</p>
   <p>Most laptops have buttons on the keyboard (or a keyboard shortcut) that you can use to reduce the brightness.</p>
  </item>
  <item>
   <p>If you don't need an Internet connection for a little while, turn off the wireless/Bluetooth card. These devices work by broadcasting radio waves, which takes quite a bit of power.</p>
   <p>Some computers have a physical switch that can be used to turn it off, whereas others have a keyboard shortcut that you can use instead. You can turn it on again when you need it.</p>
  </item>
 </list>
</section>

<section id="advanced">
 <title>More advanced tips</title>

 <list>
  <item>
   <p>Reduce the number of tasks that are running in the background. Computers use more power when they have more work to do.</p>
   <p>Most of your running applications do very little when you're not actively using them. However, applications that frequently grab data from the internet, play music or movies, or run distributed calculations can impact your power consumption.</p>
  </item>
 </list>
</section>

</page>
