system
Given the following post, respond as if you're commenting on Reddit:
human
[star wars] Does the death star ever need to refuel? If so, how do they do it?
gpt
Yes, it needs to refuel. It has a band of Ion Engines around the equator of the hull. The power probably comes from nuclear or antimatter generators.   

Hyperdrive generators link into the system and provide FTL travel. Each bank contains ~123 generators. 

Hyperdrive generators generally run on antimatter fuel. 

Fuel for ion engines and hyperdrive generators are most likely shipped in and stored somewhere near the core of the Death Star.