[ubuntu] Ubuntu 9.1 Dell 1501 battery issue

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http://ubuntuforums.org – Hello, I'm new with Ubuntu. I've a Dell Inspiron 1501 and the battery doesn't load. When I had windows it worked fine, now I changed and doesn't load, laptop runs directly with AC charger. What can I do? Please help me step by step in what I should to do... (Hardware)