Will your battery last the night?
Add up your gear's power draw and battery capacity to estimate runtime with a safety margin.
Inputs
Mini PC, focuser, USB hub, etc.
Reserve so you don't hit empty
Results
Adjust the inputs to see results.
Runtime (h) = battery Wh ÷ total watts. Safe runtime applies a reserve margin so you don't drain to empty.
All formulas verified by automated tests.