Update: Exploding Laptop (2013)
Are Lithium Ion laptop batteries any safer in 2013?
The results are disturbing.
Exploding Laptop 2013 (Extended Version)
Notebook PC Explodes
We intentionally created conditions in which the Li-ON battery pack would explode inside a generic portable. The results are dramatic. There are numerous conditions where these fires can occur in real life. Faulty battery packs (driving the recalls), faulty protection circuits inside the PC, exposure to excessive heat, and blunt force are some of the major ways that this could happen to you.
More PC Pitstop Research regarding PC Safety: