The rating on a power station describes the cells inside; what actually reaches your devices is less. Enter your gear below and see the real runtime, based on independently measured usable capacity rather than the number on the box. Full rankings live in our Honesty Index.
Real Runtime Calculator
How long a power station actually runs your gear, using independently measured usable capacity, not the number on the box.
Method: runtime = a unit's independently measured usable watt-hours divided by your total load. Fridge and freezer presets use an average cycling draw. We report the outlet that measured each unit; we do not test hardware ourselves.