Devices Battery sizes Calculator Method

Estimate runtime →

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Find your runtime

Enter a device and watt-hour capacity.

Planning estimates for batteries, power stations, UPS systems and everyday loads.

ToolsRuntime calculator Device index Charging times

Safety

Capacity in Wh does not prove that a battery can supply the required running or surge watts. Follow equipment manuals.

Planning estimates · United States · Checked July 20, 2026