The batteries things was also Morpheus’s explanation, and not necessarily a definitive fact of the fictive universe. Morpheus could have been talking out of his ass, or deliberately over-simplifying for the benefit of Neo, who he knew was kind of a dumbass.
I thought it also used them for neural CPU cycles but maybe I’m misremembering
No, that’s exactly the original thing. “Wetware”, basically… But test audiences got upset and confused, so it was changed to “batteries.”
The batteries things was also Morpheus’s explanation, and not necessarily a definitive fact of the fictive universe. Morpheus could have been talking out of his ass, or deliberately over-simplifying for the benefit of Neo, who he knew was kind of a dumbass.