About the Living Battery,
the people inside need to life to generate heat which can be transformed into power.
At a Cryo casket that won't work.
So these Living Battery need a food suply.
A hopper next to it, with special liquid food should do the job.
These liquid food will made from a cooking station and don't rot.
Ofcouse the Living Battery don't need that much food like an active pawn, maybe 0.3 to 0.5 nutri/day.