Distro Choice Help

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http://www.linuxforums.org – Hello. I am interested in dual-booting Windows XP and a linux distro on my laptop. Trouble is, I don't really know which one to use. I have used Ubuntu in the past and was quite pleased with it, however, it eats away battery power like crazy. The laptop originally was intended to be used with vista, and that had a max battery life of 5 hrs (9 cell) but with XP I can push it to 8 hours, easily. However, no matter what I did with ubuntu, which flavour I installed, I still could only get a 4 hour battery life, if I was lucky. I gave up on it, however, now I need a replacement. I have a Dell Inspiron 1545, with these configurations: Pentium Core 2 Duo at 2.00 GHz 3 GB of RAM 250 GB hard disk ATI Mobility Radeon 4300HD IDT audio card Built-in microphones webcam Dell 1515 Wireless N wireless card Marvell LAN card 9-cell battery The most important thing is a long battery life. I don't mind learning how to use a new distro. I have heard that Slackware and Gentoo are quite light, however, I would hesitate installing a new distro before I am sure that it can provide an acceptable battery life. I need a minimum of 6.5 hours of battery. Thank you for your help. mediate (HowTos)