After two recent incidents in Japan where the first-generation iPod overheated and caused minor fires; the Ministry of Economy, Trade and Industry has issued a warning to the music player. In total, there have been 14 incidents relating to the iPod Nano’s exploding battery, according to news sources in Japan, and the ministry has ordered Apple to investigate.
The investigation has determined that the batteries in the first-gen iPod sold between September 2005 and December 2006 were to blame, and has said that the company had received very few reports of such incidents – saying less than 0.001 percent of the units – all have been traced to a single battery supplier.
Apple is advising that you should contact AppleCare for a replacement battery – if the battery should overheat. This follows similar incidents in the US, but no recall notice has been made.