Is this flight software?

No. SIDUS models are educational reimplementations. Cross-check before any flight decision.

Battery energy / endurance

Stored energy from Ah·V and run-time at constant load.

SIDUS educational calculator. Category utilities. Tags: operations, power, satellite, utilities. Pure SI. Not flight software.

E = C·V · t = E/P

Battery energy and endurance

Space Mission Engineering: The New SMAD (Wertz, Everett, Puschell (eds.)): Mission engineering handbook: RF links, constellations, and ops framing.
SIDUS pure-SI implementation (sidus.tools): Local pure-function implementations in src/lib/physics (educational, independent reimplementation).
NASA-STD-3001 (Human Spaceflight standards overview) (NASA): Human-system standards context (ppO₂ / atmosphere). SIDUS flags are educational. They are not flight-rule substitutes.

Read /llms.txt or call https://sidus.tools/api/mcp. Open the interactive page for live SI inputs.