Portable Power Runtime Calculator
Estimate how long a portable power station can run a real appliance load before recharge. This calculator translates battery watt-hours into practical runtime using the assumptions that matter most in the real world.
How to use it: Enter your power station capacity in watt-hours, the appliance's running watt draw, and your estimated usable battery percentage. The result assumes a typical inverter loss and is intended for planning, not a guarantee. Higher loads, cold weather, battery aging, and surge-heavy devices can reduce actual runtime.