Total load
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Look at all loads together
The mAh figure alone is not enough. The calculator works with watt-hours, conversion losses, and a reserve you can set freely.
Calculate power runtime
Usable energy
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Calculated runtime
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Plannable time
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Which devices belong in the runtime plan?
For a mobile IRL stream, it is not just the streaming phone that counts. Add up the smartphone or camera, mobile encoder, router, every cellular modem, audio receiver, USB hubs, and any other devices that run continuously from the same power bank. What matters is the actual power draw under load. The wattage printed on a power adapter often only describes its possible maximum output.
- Measure the smartphone or camera while recording and transmitting over cellular.
- Account for the router, encoder, and each active modem separately.
- Do not forget USB hubs, voltage converters, and charging losses.
- Leave a reserve for heat, battery age, and load spikes.
Why watt-hours say more than mAh
Milliamp-hours can only be compared directly at the same voltage. Watt-hours describe the energy actually stored, which makes them better for power banks and mixed IRL setups. Example: with 74 Wh, 85 percent efficiency, and a 12 watt total load, about 5.2 hours remain on paper. With a 20 percent reserve, you should plan for closer to 4.2 hours in real use.
The calculator gives you a planning value. A test with the camera on, active cellular, display, audio, and all connected devices remains essential before a longer stream.
Important practical limits
Heat, cold, battery age, cables, voltage converters, and peak loads change the real runtime. Also check whether the power bank, cables, and distributor can deliver the power you need at the same time, continuously.
Privacy and security
This tool works locally in your browser. IRL4YOU neither transmits nor stores your inputs. Credentials still do not belong in screenshots or public support messages.