Nokia announced a product advisory for thier BL-5c model battery manufactured by Matsushita Battery Industrial Co. Ltd. of Japan between December 2005 and November 2006.
Nokia has several suppliers for BL-5C batteries that have collectively produced more than 300 million BL-5C batteries. This advisory applies only to the 46 million batteries manufactured by Matsushita between December 2005 and November 2006.
There have been approximately 100 incidents of over heating reported globally. No serious injuries or property damage have been reported.
Nokia has identified that in very rare cases the affected batteries could potentially experience over heating initiated by a short circuit while charging, causing the battery to dislodge. Nokia is working closely with relevant local authorities to investigate this situation.
According to Nokia’s knowledge this issue does not affect any other use of the mobile device. Concerned consumers may want to monitor a mobile device while charging that contains a BL-5C battery subject to this product advisory.
While the occurence in the BL-5C batteries produced by Matsushita in the time-period specified is very rare, for consumers wishing to do so, Nokia and Matsushita offer to replace for free any BL-5C battery subject to this product advisory.
BL-5C Specifications
Battery: Li-Ion 3.7v 850mAh
Weight: 24g
Talk time: 2 to 4 hours *
Standby time: 150 – 240 hours *
Charging time: 1h 35mins *
BL-5C Compatibility:
Nokia N70, N71, N72, N91, E50, E60, 7610, 6822, 6820, 6681, 6680, 6670, 6630, 6600, 6270, 6230i, 6230, 6030, 3660, 3120, 3100, 2600, 2610, 2300, 2310, 1600, 1100, 1110, 1110i, 1112, 1101, 1100, N-Gage and other compatible phones.
“Nokia†and “BL-5C†are printed on the front of the battery. On the back of the battery, the Nokia mark appears at the top, and the battery identification number (consisting of 26 characters) is found at the bottom. If the battery identification number does not contain 26 characters, it is not subject to this product advisory.
How To Know:
If your battery is a BL-5C model, remove
the battery and check the 26-character
identification number from the back of the battery. Enter the identification number in the field at Nokia advisory page  and you will be advised if your battery may be replaced. If your battery is not a BL-5C model, you are not included in this product advisory and your product will not be replaced. 
If by unluck, you have a BL-5C battery and that too a defect one….let me know
by commenting here.
I just checked My dad’s Battery. Its BL-5C but not a defect one. Thank God and Thank Nokia n Matsushita.
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