I am wondering why they specify a CO2 extinguisher for fire, vs the more readily available dry chemical ABC and BC extinguishers. I understand why not water, lithium is quite reactive to water.
I would prefer to use a BC extinguisher on electrical, given the choice, because sodium bicarbonate does not fuse to the surfaces. ABC extinguishers, monoammoium phosphate, tends to melt and fuse to everything rendering parts that could have been undamaged unusable.
Phil