A number of cells exploded in 2003, a great many of them Nokia phones. According to Nokia, third-party or counterfeit batteries were to blame: in each and every exploding phone case it investigated, the battery in question proved not to be original to the unit and not to have included industry-standard safety measures. It also found the vast majority of short circuits that led to these explosions were caused by the units' having undergone traumatic events (such as being dropped) which jeopardized the integrity of poorly-manufactured batteries.
DonO wrote:
Jimmy, I also heard that was usually with aftermarket batteries. DonO
