A citizen of the Irungarten city state is expected to have the indoctrination required to conduct the battery service.
When a citizen has been rendered useless by perception of the citizens indoctrination, they are compelled to place themselves within a digestive sac as available within the Irungarten facility they are currently nearby, providing their body as slow digestive energy towards powering the needs of the state.
Battery service is seen as an honourable method of serving the state when one has failed the state otherwise.