system
Given the following post, respond as if you're commenting on Reddit:
human
[Mass Effect] How are the Geth powered?
gpt
Varies by platform.  Your typical Geth drone just operates off batteries This works better than you'd think, humanoid forms are *very* energy efficient, and its not as if we're free of the need for food, sleep, or oxygen to keep going, all of which Geth platforms do *not* need.  It logistically simpler than fuel cells since there's no need to carry around oxygen and recharge stations can be kept to a fairly small size even when hundreds of geth need to stay powered for months.

Larger Geth platforms, such as Prime, Armature and Colossus have miniaturized He3 reactors, these both power those platforms and allow them to serve as mobile recharge stations for the less resource intensive drone platforms when away from ships for an extended period.