Question regarding battery life in operational robots

I’m working on a project for Industrial Design school in which i’m designing a conceptual autonomous robot

that will exist in the near future (about 10 years from now).

The robot is a medium sized wheeled robot (lets say 70*70*70 cm) that is supposed to chase away birds from commercial airstrips (runways), its functions are locating birds, driving towards them and playing loud noises through a speaker.

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The question is: How long (very roughly) could a robot like that operate between having to recharge its batteries? (with the hardware predicted to exist 10 years from now)

Thanks!

submitted by /u/OrLevCo
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