^ on the suspended fold theory. The fold explanation states the longer they're in fold the energy demands grow at an exponential rate (i think).
At that max point they don't explain if they just drop out of fold or blow up
interesting point about the infested carrier though, I some how doubt the Vajra would drag the ship back to their territory just to infest it. So the question would be what fleet has passed near there or how long would it take for a derelict one to drift that far.