Typical wattage range
5-45 W. Use a measured average when the device matters.
Emergency backup
Portable radio Runtime Estimate
Emergency radios are usually low draw, but charging mode and volume can change consumption.
Planning default
15 W at 100% duty cycle.
Confidence label
estimated. Treat the result as a planning estimate, not a lab measurement.
How to use this scenario
- Start with 15 W if you do not have a watt-meter reading yet.
- Portable radio is treated as a continuous load, so runtime is sensitive to the real wattage you enter.
- Keep at least a planning reserve because battery age, temperature, output path, and device settings can move the result.
Watch-outs
- The scenario wattage is an estimate. Measure the real load before relying on it for outage, travel, or critical planning.
Sources
- U.S. Department of Energy appliance energy estimation guide (official) - Explains how to calculate energy use from wattage, hours, and nameplate current.