In this instructable, you will learn how to extend the life of a laptop's charge. If you are going to be flying or driving long distance, these steps can help make the battery last much longer then usual and make the ride a little less stressful. There are many simple steps and some more complicated steps but in the end, I was able to achieve an 8 hour charge on my year old laptop. The results will vary for your laptop if you have an inefficient CPU or a high RPM hard drive the gain will be smaller, but generally you will gain more time out of one charge. In some cases, following these steps can even extend the life of the battery. Which means savings of 100 dollars or more. The laptop used in this instructable is a HP Pavilion DV5130ca Specs: 2.0 GHz - AMD Turion 64 120 Gigabyte 4700 rpm Broadcom 802.11b/g wireless adapter 128 mb ATI Rage Mobile Windows XP MCE 2005 All other specifications are insignificant when configuring a PC for power management.
http://www.instructables.com/id/How-to-extend-the-life-of-your-laptops-battery-ch/