The Associated Press reports that computer makers are recalling 100,000 laptop battery packs made by Sony Corp. after 40 reports of overheating, according to an Oct. 30 notice from the U.S. Consumer Product Safety Commission. The voluntary recall applies to certain Sony 2.15Ah lithium-ion cell batteries made in Japan and sold around the world in laptops made by Hewlett-Packard Co., Dell Inc., and Toshiba Corp. Some incidents involved smoke or flames, according to Sony. Twenty-one of the reports claimed minor property damage, and small burns were reported in four cases. Sony blamed two factors for the defects: adjustments on its manufacturing line from October 2004 to June 2005, which might have affected the quality of cells in certain production lots; and a possible flaw in the metal foil for electrodes. The company said no reports have been filed for batteries made after 2006, and it noted that the recalled units are a small fraction of the more than 260 million it has shipped over six years. The bulk of the 35,000 affected computers in the United States were sold by HP between December 2004 and June 2006, according to the safety commission, including HP Pavilion, HP Compaq, and Compaq Presario models. Some Dell Latitude and Inspiron models shipped between November 2004 and November 2005 are also covered by the recall, as well as some Toshiba Satellite and Tecra laptops sold from April 2005 to October 2005…

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