On Fri, 16 May 2014 22:45:08 -0700, David Platt wrote:

The Halon suppresses
some of the flame reactions and stops the fire, but it doesn't get rid
of the poisonous partially-combusted plastics and other decomposed
flammables.

This is very interesting. It makes sense.

Here's an airplane lithium battery fire article that partially backs up
your observation that the halon itself doesn't prevent the toxic fumes
from killing us.

http://www.highwaterinnovations.com/...ment-FINAL.pdf