Insta360 Go 2 Battery Life Question

Does anyone know how how much power Go 2 consumes while projecting onto the app, but not actually recording?

I was wanting to use this camera for a project I'm working on but it requires super long battery life. Quality isn't the most important so I thought I could screen record the app's live stream of the camera's view. I'll be keeping the phone in my pocket so it can be power bricked, but the camera would be in motion. If the battery life doesn't extend long enough then I'll have to find a super small power brick.

Thanks! I thought I'd ask before buying the camera.