This only counts if you are using your laptop without a charger.
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There is a way to improve your battery life. First check to see what performance your laptop is on, highlight over the battery. [ Register or Signin to view external links. ] Then right click on the battery and click power options. [ Register or Signin to view external links. ] Now click it, and it should look like this. [ Register or Signin to view external links. ] This is were you will see the three options there are too choose from, if you don't like the options there are, you can customize it by clicking on these two things. [ Register or Signin to view external links. ] Now by clicking Power save will give you optimal battery life for your laptop.I hope this was a half descent Tut.

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First the obvious point to make a laptop battery last, turn off the lap top when not in use. Have it in power saving mode as a secondary battery power saver should you get distracted.
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While online have functions on your IM and email set to manual not automatic.
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3

If you are out of coverage either WiFi or GSM 3G down off the mobile internet so as not to waste energy searching.
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Another simple step to make a laptop battery last is to turn down the brightness on your screen. Also if you are listening to music or a movie turn the volume down.
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Use your applications designed to make a laptop battery last. If you have a Mac use your Health Monitor and if you have a PC use your Laptop Battery Power Monitor. These applications will track your battery charge and also how many cycles you will be able to recharge your lithium-ion battery.
Resources:http://www.ehow.com/how_6079167_make-laptop-battery-last.html