Japan\u2019s Matsushita Electric Industrial (Panasonic) said it has developed a lithium-ion battery that won\u2019t overheat even if a short circuit occurs.The new battery includes a heat-resistive insulator inside the battery cell, next to an existing separator that insulates the anode and cathode. If that separator is punctured, a short circuit occurs that typically causes the battery to overheat and in some circumstances catch fire. Panasonic said its insulator layer ensures that the battery won\u2019t overheat even in the event of a short circuit.Panasonic\u2019s announcement responds to consumers\u2019 concern about the safety of lithium-ion batteries following a number of incidents involving them.Earlier this year, most major laptop computer makers started recall or exchange programs for batteries containing lithium-ion cells made by Sony after a number of batteries overheated and caught fire. Sony blamed the problem on metallic particles that got inside the battery during production, puncturing the separator layer and causing a short circuit. The replacement program covers 9.6 million batteries and will cost Sony up to 51 billion yen (US$432 million).Then on Dec. 7, Japanese mobile carrier NTT DoCoMo and handset maker Mitsubishi Electric recalled 1.3 million cell-phone batteries made by Sanyo Electric, saying they could overheat and catch fire.Panasonic\u2019s new batteries are made by another company in the Matsushita group, Matsushita Battery Industrial, and are ready for mass production, said Akira Kadota, a spokesman for Panasonic in Tokyo. The batteries aren\u2019t available directly to end users but are sold in bulk to electronics product manufacturers, so Panasonic wouldn\u2019t reveal their price. Kadota said they could be more expensive than current cells but could also work out cheaper if large orders are placed.Matsushita Battery Industrial is one of the largest battery makers in Japan.-Martyn Williams, IDG News Service (Tokyo Bureau)Related Links:\n\nSony Battery Recalls: Who\u2019s Next?\n\nImproved Laptop Battery Standard \u2018Within Months,\u2019 IEEE Says\n\nNEC Admits Its Desktops Caught Fire in JapanCheck out our CIO News Alerts and Tech Informer pages for more updated news coverage.