system
Given the following post, respond as if you're commenting on Reddit:
human
[Terminator] What powers the T-1000?
gpt
While a T-1000 is made of liquid metal, it still requires discrete parts for systems like sensors, powerplants, computation rtc. While these parts would normally be large and centralized in another model, the T-1000 uses thousands of miniature systems and disperses them throughout it's liquid metal frame in a network. 

The actual powerplant for a T-1000 is a 'network' of thousands of cell-sized fission generators, which work  in tandem to keep a current running through the liquid metal frame. (This is how it keeps it's shape.) This powerplant system  is somewhat weaker than that of other models, and the T-1000 has to forego luxuries like the built-in weapons used the the T-X models for instance.