There are, so far, two separate incidents with Nokia phone's batteries blowing up recently:
The first, where Nokia blamed a battery not made by Nokia for the problem, and now this latest where even Nokia admits in their official release that it was a fairly new phone, had not been abused in any way that they could tell, and was wearing a stock Nokia battery.
This has happened in the past with lithium cells in Thompson (GE) cellphones in Britain (factory installed batteries) and with several brands of lithium cell powered aircraft Emergency Locator Transmitters (ELT's) with factory batteries.
There have also been shipments of lithium batteries, from the factories, that have caught fire on the pallet.
Most any battery can be hazardous, the thing with lithium batteries is the ability to release so much of their power in a very short time.
This is not saying that lithium batteries are bad, or anything like that, just warning that they can go nuts (and I'd be nervous about carrying them in my front jean pocket. /ubbthreads/images/graemlins/ooo.gif )
Here's a
third recent Nokia explosion. (That story also mentions a new Kyocera cellphone exploding in Nebraska, and Kyocera has stopped shipping that model.)
Hewre's a decently written report for the folks down under about the recent mobile phone explosions:
ZD Net
There have been the odd reports over the years, too. Like the suitcase of cheap lithium cell powered Chinese wristwatches being smuggled that exploded in '91. or the GPS receiver that exploded at Fort Irwin, etc.
Some caution is probably a good idea is all ...