They try to test the heat using a remote thermometer (like the one mentioned in today’s Morning Deals) but the temp is so high, the instrument gives an error code. This means the temperature was over 1000 degrees Fahrenheit.
The voice over notes that this laptop fire is an electrical, chemical, and metal fire. You need a Class D fire extinguisher to put it out. The wrong kind of extinguisher can actually cause the fire to spread. — BEN POPKEN
Previously: Backstory on battery recalls.
Actual Video of an Exploding Laptop Battery [Gizmodo] (Thanks to Ben!)