Nokia has officially admitted that BL-5C batteries are unsafe. Nokia has for the first time came out officially saying that BL-5C batteries manufactures by Matsushita Battery Industrial Co. Ltd. of Japan. There are around 30billion batteries of this model already in market.
Nokia has adviced the customers to check for battery issue at the website http://nokia.com/batteryreplacement
Incase, if you are in India, please dial up the number below to get in touch with the Nokia care desk (30303838 )
I gotta check mine too
Cheers,
Vaibhav