The latest LangaList newsletter talks about caring for laptop batteries:
Your best bet is to start with the laptop vendor’s site to see what the official recommendations are: Check their web site for detailed care-and-feeding info. But then cross-reference that info with an objective, third-party source who’s not trying to sell you anything. A general resource like http://www.batteryuniversity.com/ , or the more-in-depth sites it can link you to, may be useful.
Battery University seems quite helpful. Check it out!