>The Thermite like reaction is because the oxides bound in the
>materials of the battery form a redux reaction in which they
>reduce from one material (caused by heat) and bind with other
>ones causing greater heat this proces is self sustained,
>exotherm, and needs no Oxigen. Any CO2 would be ineffective
>unless you could cool the whole thing with liquid co2.

For this reason I would doubt that CO2 is the right method for attempting to
extinguish it. The heat would get high enough to split the CO2, helping fuel
the fire.

A non oxygen containing extinguisher would probably be required.

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