Recent TV news and newspapers are reporting that some of Nokia-branded BL-5C batteries, manufactured by Matsushita Battery Industrial Co. Ltd. of Japan, have the problems that they may experience over heating initiated by a short circuit while charging, causing the battery to dislodge. Nokia has the page that will check if your BL-5C batteries are problematic or not by entering the identification number printed on them.
I have six BL-5C batteries for my Nokia cellphones, such as Nokia6630, 7600, 6680, N71 and a GPS receiver. According to this web site, one battery out of the six was part of this product advisory. I ordered the replacement of it through the web site.
